Patents by Inventor Charles M. Marshall
Charles M. Marshall has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10348053Abstract: A tunable laser has a solid state laser medium having an optical gain region and generates coherent radiation through a facet. A lens collects the coherent radiation and generates a collimated light beam. Components of an external cavity include a reflective surface and an optical filter, the reflective surface reflecting the collimated beam back to the lens and the laser medium, the optical filter positioned between the reflective surface and the lens and having two surfaces with a thermally tunable optical transmission band within the optical gain region of the laser medium. The optical filter (1) transmits a predominant portion of the collimated beam at a desired wavelength of operation, and (2) specularly reflects a remaining portion of the collimated beam from each surface, the collimated beam being incident on the optical filter such that the reflected collimated beams propagate at a non-zero angle with respect to the incident collimated beam.Type: GrantFiled: July 12, 2017Date of Patent: July 9, 2019Assignee: Redshift Bioanalytics, Inc.Inventors: Eugene Yi-Shan Ma, Charles M. Marshall
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Publication number: 20170317470Abstract: A tunable laser has a solid state laser medium having an optical gain region and generates coherent radiation through a facet. A lens collects the coherent radiation and generates a collimated light beam. Components of an external cavity include a reflective surface and an optical filter, the reflective surface reflecting the collimated beam back to the lens and the laser medium, the optical filter positioned between the reflective surface and the lens and having two surfaces with a thermally tunable optical transmission band within the optical gain region of the laser medium. The optical filter (1) transmits a predominant portion of the collimated beam at a desired wavelength of operation, and (2) specularly reflects a remaining portion of the collimated beam from each surface, the collimated beam being incident on the optical filter such that the reflected collimated beams propagate at a non-zero angle with respect to the incident collimated beam.Type: ApplicationFiled: July 12, 2017Publication date: November 2, 2017Inventors: Eugene Yi-Shan Ma, Charles M. Marshall
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Patent number: 9742148Abstract: A tunable laser has a solid state laser medium having an optical gain region and generates coherent radiation through a facet. A lens collects the coherent radiation and generates a collimated light beam. Components of an external cavity include a reflective surface and an optical filter, the reflective surface reflecting the collimated beam back to the lens and the laser medium, the optical filter positioned between the reflective surface and the lens and having two surfaces with a thermally tunable optical transmission band within the optical gain region of the laser medium. The optical filter (1) transmits a predominant portion of the collimated beam at a desired wavelength of operation, and (2) specularly reflects a remaining portion of the collimated beam from each surface, the collimated beam being incident on the optical filter such that the reflected collimated beams propagate at a non-zero angle with respect to the incident collimated beam.Type: GrantFiled: December 16, 2014Date of Patent: August 22, 2017Assignee: Redshift Bioanalytics, Inc.Inventors: Eugene Yi-Shan Ma, Charles M. Marshall
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Publication number: 20150103851Abstract: A tunable laser has a solid state laser medium having an optical gain region and generates coherent radiation through a facet. A lens collects the coherent radiation and generates a collimated light beam. Components of an external cavity include a reflective surface and an optical filter, the reflective surface reflecting the collimated beam back to the lens and the laser medium, the optical filter positioned between the reflective surface and the lens and having two surfaces with a thermally tunable optical transmission band within the optical gain region of the laser medium. The optical filter (1) transmits a predominant portion of the collimated beam at a desired wavelength of operation, and (2) specularly reflects a remaining portion of the collimated beam from each surface, the collimated beam being incident on the optical filter such that the reflected collimated beams propagate at a non-zero angle with respect to the incident collimated beam.Type: ApplicationFiled: December 16, 2014Publication date: April 16, 2015Inventors: Eugene Yi-Shan Ma, Charles M. Marshall
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Patent number: 8942267Abstract: A tunable laser has a solid state laser medium having an optical gain region and generates coherent radiation through a facet. A lens collects the coherent radiation and generates a collimated light beam. Components of an external cavity include a reflective surface and an optical filter, the reflective surface reflecting the collimated beam back to the lens and the laser medium, the optical filter positioned between the reflective surface and the lens and having two surfaces with a thermally tunable optical transmission band within the optical gain region of the laser medium. The optical filter (1) transmits a predominant portion of the collimated beam at a desired wavelength of operation, and (2) specularly reflects a remaining portion of the collimated beam from each surface, the collimated beam being incident on the optical filter such that the reflected collimated beams propagate at a non-zero angle with respect to the incident collimated beam.Type: GrantFiled: May 16, 2012Date of Patent: January 27, 2015Assignee: Redshift Systems CorporationInventors: Eugene Yi-Shan Ma, Charles M. Marshall
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Patent number: 8410775Abstract: A base station (e.g., a central device including a transducer assembly of one or more orthogonal transducers) transmits a magnetic field at a known power level and direction. The magnetic field signal includes data information transmitted from the base station to a movable remote station. The remote station includes a transducer assembly of one or multiple transducer coils to receive the magnetic field generated by the base station. Location and orientation of the remote station (with respect to the base station) are determined based on the magnitude, amplitude, and/or phase of magnetic field signals received on each of the remote station's transducers. The remote station may transmit the location and orientation information (e.g., raw measured data or converted data) to the base station using the same coils as used by the remote station to receive the magnetic field generated by the base station.Type: GrantFiled: May 12, 2009Date of Patent: April 2, 2013Assignee: Radeum, Inc.Inventors: Jeffrey R. LaFranchise, Vincent Palermo, Charles M. Marshall
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Publication number: 20120294321Abstract: A tunable laser has a solid state laser medium having an optical gain region and generates coherent radiation through a facet. A lens collects the coherent radiation and generates a collimated light beam. Components of an external cavity include a reflective surface and an optical filter, the reflective surface reflecting the collimated beam back to the lens and the laser medium, the optical filter positioned between the reflective surface and the lens and having two surfaces with a thermally tunable optical transmission band within the optical gain region of the laser medium. The optical filter (1) transmits a predominant portion of the collimated beam at a desired wavelength of operation, and (2) specularly reflects a remaining portion of the collimated beam from each surface, the collimated beam being incident on the optical filter such that the reflected collimated beams propagate at a non-zero angle with respect to the incident collimated beam.Type: ApplicationFiled: May 16, 2012Publication date: November 22, 2012Applicant: REDSHIFT SYSTEMS CORPORATIONInventors: Eugene Yi-Shan Ma, Charles M. Marshall
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Patent number: 7697192Abstract: A thin-film interference filter structure has a generally wavelength-dependent resonant response to incident optical energy in a predetermined range of wavelengths. The thin-film interference filter structure includes a thermally tunable layer having a thermally tunable optical characteristic such that a range of wavelength-dependent resonant optical responses of the thermally tunable layer are induced by a corresponding range of thermal conditions of the thermally tunable layer. The thin-film interference filter structure is configured to (1) receive a spatially varying pattern of thermal energy at the thermally tunable layer to impart a corresponding spatially varying pattern to the thermally tunable characteristic of the thermally tunable layer, and (2) receive the incident optical energy into the thermally tunable layer and output optical energy having spatial modulation corresponding to the spatially varying pattern of the thermally tunable characteristic.Type: GrantFiled: April 2, 2009Date of Patent: April 13, 2010Assignee: Redshift Systems CorporationInventors: Matthias Wagner, Shuyun Wu, Charles M. Marshall, Eugene Y. Ma, John F. Heanue
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Publication number: 20100045269Abstract: A base station (e.g., a central device including a transducer assembly of one or more orthogonal transducers) transmits a magnetic field at a known power level and direction. The magnetic field signal includes data information transmitted from the base station to a movable remote station. The remote station includes a transducer assembly of one or multiple transducer coils to receive the magnetic field generated by the base station. Location and orientation of the remote station (with respect to the base station) are determined based on the magnitude, amplitude, and/or phase of magnetic field signals received on each of the remote station's transducers. The remote station may transmit the location and orientation information (e.g., raw measured data or converted data) to the base station using the same coils as used by the remote station to receive the magnetic field generated by the base station.Type: ApplicationFiled: May 12, 2009Publication date: February 25, 2010Inventors: Jeffrey R. LaFranchise, Vincent Palermo, Charles M. Marshall
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Publication number: 20090195859Abstract: A thin-film interference filter structure has a generally wavelength-dependent resonant response to incident optical energy in a predetermined range of wavelengths. The thin-film interference filter structure includes a thermally tunable layer having a thermally tunable optical characteristic such that a range of wavelength-dependent resonant optical responses of the thermally tunable layer are induced by a corresponding range of thermal conditions of the thermally tunable layer. The thin-film interference filter structure is configured to (1) receive a spatially varying pattern of thermal energy at the thermally tunable layer to impart a corresponding spatially varying pattern to the thermally tunable characteristic of the thermally tunable layer, and (2) receive the incident optical energy into the thermally tunable layer and output optical energy having spatial modulation corresponding to the spatially varying pattern of the thermally tunable characteristic.Type: ApplicationFiled: April 2, 2009Publication date: August 6, 2009Applicant: REDSHIFT SYSTEMS CORPORATIONInventors: Matthias Wagner, Shuyun Wu, Charles M. Marshall, Eugene Y. Ma, John F. Heanue
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Patent number: 7565187Abstract: An apparatus for portable communications including a wireless headset, attachment that mechanically and electrically connects to a cellular phone or other electronic device, and a base unit that includes an attachment interface to connect mechanically and electrically with the attachment to allow the base unit to receive electrical signals from the cellular phone. The base unit wirelessly transmits a representation of an electrical signals received from the cellular phone to the wireless headset. The apparatus may also include a clip to attach the integrated base unit to an article of clothing, such as a belt, worn by a person.Type: GrantFiled: April 11, 2003Date of Patent: July 21, 2009Assignee: Radeum, Inc.Inventors: Michael R. Dynok, Vincent Palermo, Charles M. Marshall, Timothy E. White
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Patent number: 7532901Abstract: A base station (e.g., a central device including a transducer assembly of one or more orthogonal transducers) transmits a magnetic field at a known power level and direction. The magnetic field signal includes data information transmitted from the base station to a movable remote station. The remote station includes a transducer assembly of one or multiple transducer coils to receive the magnetic field generated by the base station. Location and orientation of the remote station (with respect to the base station) are determined based on the magnitude, amplitude, and/or phase of magnetic field signals received on each of the remote station's transducers. The remote station may transmit the location and orientation information (e.g., raw measured data or converted data) to the base station using the same coils as used by the remote station to receive the magnetic field generated by the base station.Type: GrantFiled: February 18, 2004Date of Patent: May 12, 2009Assignee: Radeum, Inc.Inventors: Jeffrey R. LaFranchise, Vincent Palermo, Charles M. Marshall
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Patent number: 7522328Abstract: An apparatus includes a thin-film interference filter structure having a generally wavelength-dependent resonant response to incident optical energy in a predetermined range of wavelengths. The thin-film interference filter structure includes a thermally tunable layer having a thermally tunable optical characteristic such that a range of wavelength-dependent resonant optical responses of the thermally tunable layer are induced by a corresponding range of thermal conditions of the thermally tunable layer. The thin-film interference filter structure is configured to (1) receive a spatially varying pattern of thermal energy at the thermally tunable layer to impart a corresponding spatially varying pattern to the thermally tunable characteristic of the thermally tunable layer, and (2) receive the incident optical energy into the thermally tunable layer and output optical energy having spatial modulation corresponding to the spatially varying pattern of the thermally tunable characteristic.Type: GrantFiled: May 11, 2007Date of Patent: April 21, 2009Assignee: Redshift Systems CorporationInventors: Matthias Wagner, Shuyun Wu, Charles M. Marshall, Eugene Y. Ma, John F. Heanue
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Publication number: 20080088906Abstract: An apparatus includes a thin-film interference filter structure having a generally wavelength-dependent resonant response to incident optical energy in a predetermined range of wavelengths. The thin-film interference filter structure includes a thermally tunable layer having a thermally tunable optical characteristic such that a range of wavelength-dependent resonant optical responses of the thermally tunable layer are induced by a corresponding range of thermal conditions of the thermally tunable layer. The thin-film interference filter structure is configured to (1) receive a spatially varying pattern of thermal energy at the thermally tunable layer to impart a corresponding spatially varying pattern to the thermally tunable characteristic of the thermally tunable layer, and (2) receive the incident optical energy into the thermally tunable layer and output optical energy having spatial modulation corresponding to the spatially varying pattern of the thermally tunable characteristic.Type: ApplicationFiled: May 11, 2007Publication date: April 17, 2008Applicant: Redshift Systems CorporationInventors: Matthias Wagner, Shuyun Wu, Charles M. Marshall, Eugene Y. Ma, John F. Heanue
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Patent number: 7215924Abstract: Contents of one or more received messages can be analyzed to determine whether a transceiver device generating the inductive field has already been programmed with a unique communication code. If not, bidirectional communications can be established to program the transceiver device with a unique communication code over an inductive link. Orientation or position of a transceiver device can be used to initiate a process for programming a communication code. Generally, the communication code can define a unique relationship between two or more transceiver devices.Type: GrantFiled: August 26, 2005Date of Patent: May 8, 2007Assignee: Aura Communications Technology, Inc.Inventors: Vincent Palermo, Charles M. Marshall, Timothy E. White, Stephen A. Voegelin, Jeffrey R. LaFranchise
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Patent number: 6819762Abstract: An ear mounted speaker assembly provides improved internal and external stability of a “in-the-ear” headset. A housing containing a speaker further contains an extender, audio portion and electrical compartment. The extender is adapted to rest in the intertragic notch of the ear. The audio portion is mounted to the extender and is of greater width than the extender. The audio portion is adapted to be positioned within the lower concha behind the tragus and antitragus of the ear. The compressible retainer extends from the surface of the housing and presses against the upper concha of the ear. The strut extends from the lower surface of the housing below the extender and extends downward outside the intertragic notch and presses against skin to stabilize the speaker assembly within the ear. Compressible retainers may be interchangeable and may come in a kit containing a plurality of interchangeable compressible retainers of a variety of shapes.Type: GrantFiled: September 10, 2001Date of Patent: November 16, 2004Assignee: Aura Communications, Inc.Inventors: Andrew R. Jones, Andrew G. Ziegler, Charles M. Marshall, Timothy E. White
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Patent number: 6791610Abstract: A focal plane array sensor includes optics located along an optical path, for transmitting radiation. A focal plane array and integrated circuit, located along the optical path for receiving the transmitted radiation, responsively produces image signals from the transmitted radiation. The integrated circuit includes apparatus for converting the image signals into digital image data at digital image data outputs.Type: GrantFiled: September 14, 1998Date of Patent: September 14, 2004Assignee: Lockheed Martin IR Imaging Systems, Inc.Inventors: Neal R. Butler, Charles M. Marshall
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Patent number: 6774349Abstract: The invention provides a golf feedback system. A mat is used to determine player foot position, and a 3D golf tracking system tracks golf balls hit from the mat to determine (a) a ground ball track and (b) a player orientation axis, based on the foot position and relative to the mat. The system further determines information indicative of how well the ground ball track correlated to the orientation axis. Preferably, a golfer using the system is led through a plurality of pin target locations in a simulated golf game. The system evaluates and stores information such as slice and hook, accuracy, player orientation axis and ball carry distance such that the player can evaluate his/her game individually or against one or more other players.Type: GrantFiled: February 19, 2002Date of Patent: August 10, 2004Inventors: Curtis A. Vock, Kevin J. Grealish, Robert D. Frey, George Nauck, Charles M. Marshall
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Patent number: 6515285Abstract: Methods and apparatus for compensating a radiation sensor for ambient temperature variations. Ambient temperature variations may produce undesirable artifacts in electronic signals output by a radiation sensor. In some cases, such artifacts may detrimentally reduce the dynamic range of the sensor and/or processing circuitry associated with the sensor with respect to radiation of interest. The radiation sensor may be compensated for such undesirable artifacts by, for example, adding an appropriate offset to a sensor bias voltage or a sensor bias current, and/or controlling a temperature of the radiation sensor, based on variations in the ambient temperature.Type: GrantFiled: February 11, 2000Date of Patent: February 4, 2003Assignee: Lockheed-Martin IR Imaging Systems, Inc.Inventors: Charles M. Marshall, Neal R. Butler
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Publication number: 20020131585Abstract: An ear mounted speaker assembly provides improved internal and external stability of a “in-the-ear” headset. A housing containing a speaker further contains an extender, audio portion and electrical compartment. The extender is adapted to rest in the intertragic notch of the ear. The audio portion is mounted to the extender and is of greater width than the extender. The audio portion is adapted to be positioned within the lower concha behind the tragus and antitragus of the ear. The compressible retainer extends from the surface of the housing and presses against the upper concha of the ear. The strut extends from the lower surface of the housing below the extender and extends downward outside the intertragic notch and presses against skin to stabilize the speaker assembly within the ear. Compressible retainers may be interchangeable and may come in a kit containing a plurality of interchangeable compressible retainers of a variety of shapes.Type: ApplicationFiled: September 10, 2001Publication date: September 19, 2002Applicant: Aura Communications, Inc.Inventors: Andrew R. Jones, Andrew G. Ziegler, Charles M. Marshall, Timothy E. White