Patents by Inventor John Rasmussen

John Rasmussen 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).

  • Patent number: 7715505
    Abstract: Methods and apparatus for synchronization (SYNC) detection of a received serial offset quadrature pulse shaped waveform modulated by a symbol SYNC sequence are provided. The waveform is serially demodulated into a serial baseband signal and correlated in parallel with segments of the symbol SYNC sequence. Correlation strength estimates of each of the correlated output signals are computed and used to adjust a SYNC threshold level. The correlation strength estimates or the correlated output signals are combined and a peak is determined in the resulting signal. The peak in the resulting signal is compared to the SYNC threshold level to detect synchronization.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: May 11, 2010
    Assignee: ITT Manufacturing Enterprises, Inc
    Inventor: Donald John Rasmussen
  • Publication number: 20090323867
    Abstract: Methods and apparatus for synchronization (SYNC) detection of a received serial offset quadrature pulse shaped waveform modulated by a symbol SYNC sequence are provided. The waveform is serially demodulated into a serial baseband signal and correlated in parallel with segments of the symbol SYNC sequence. Correlation strength estimates of each of the correlated output signals are computed and used to adjust a SYNC threshold level. The correlation strength estimates or the correlated output signals are combined and a peak is determined in the resulting signal. The peak in the resulting signal is compared to the SYNC threshold level to detect synchronization.
    Type: Application
    Filed: December 21, 2005
    Publication date: December 31, 2009
    Inventor: Donald John Rasmussen
  • Publication number: 20090313331
    Abstract: Tools and techniques are described for merging versions of documents using multiple masters. These tools may provide methods that include syncing a first peer system with at least a second peer system, with the first and second peer systems receiving respective instances of a document for collaborative editing. The first and second peer systems may maintain respective version histories associated with the document, with these version histories capturing and storing revisions occurring locally at the first and second peer systems. The first and second peer systems may exchange version histories, and merge these version histories.
    Type: Application
    Filed: June 13, 2008
    Publication date: December 17, 2009
    Applicant: MICROSOFT CORPORATION
    Inventors: David John Rasmussen, Simon P. Clarke, Peter P. Baer
  • Patent number: 7630428
    Abstract: Methods and apparatus for determining carrier frequency error of a serial offset quadrature pulse shaped signal, such as a minimum shift keyed (MSK) signal, are disclosed. Carrier frequency error is determined by receiving a quadrature pulse shaped signal having a synchronization sequence, detecting synchronization of the quadrature pulse shaped signal, and storing a baseband inphase (I) signal and a baseband quadrature (Q) signal of the synchronization sequence while detecting synchronization. After detecting synchronization, segments of the stored baseband I and Q signals are read and correlated with a spreading sequence. Carrier frequency error is then estimated based on phase differences between each of the correlated segments.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: December 8, 2009
    Assignee: ITT Manufacturing Enterprises, Inc.
    Inventors: Donald John Rasmussen, Gregory Thomas Barnett
  • Publication number: 20090276471
    Abstract: Tools and techniques are described for automatically capturing and maintaining versions of documents. These tools may provide methods that include receiving documents from a server, and receiving indications of revisions to the documents at client systems. The methods may also automatically determine whether to capture representations of states of the documents before entry of the revisions, in the absence of explicit user commands to capture these representations.
    Type: Application
    Filed: May 5, 2008
    Publication date: November 5, 2009
    Applicant: MICROSOFT CORPORATION
    Inventors: Peter Baer, Simon Clarke, David John Rasmussen, Ilya Koulchin, David Christopher Tse, Olga Veselova
  • Patent number: 7609755
    Abstract: A simplified timing correction method is provided for data despreading of serial offset quadrature pulse-shaped spread signals. The simplified timing correction algorithm is applied to a rake receiver for improved performance in a multi-path channel. Serial formatting of the spreading modulation waveform is selected to reduce the SYNC/serial probe correlation complexity. The method includes the steps of: (a) decimating serial inphase (I) and quadrature (Q) signals to form decimated I and Q even samples and decimated I and Q odd samples; (b) obtaining an autocorrelation profile of a spreading sequence used by the receiver; (c) detecting a synchronization starting point using the I and Q even samples; and (d) deciding to either move, or not move, the synchronization starting point, based on the autocorrelation profile obtained in step (b). Step (d) decides to move the synchronization starting point, and uses the I and Q odd samples for subsequent despreading of the I and Q signals.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: October 27, 2009
    Assignee: ITT Manufacturing Enterprises, Inc.
    Inventor: Donald John Rasmussen
  • Patent number: 7593454
    Abstract: A method of correcting phase error of a phase shift keyed (PSK) signal includes (a) receiving a signal modulated by a spreading sequence; (b) despreading the received signal using a receiver spreading sequence similar to the spreading sequence of step (a); (c) calculating a crosscorrelation profile between the receiver spreading sequence and the received signal; and (d) calculating an autocorrelation profile of the receiver spreading sequence to determine a spreading code property (SCP). The method also includes (e) estimating a timing error in alignment between the autocorrelation and the crosscorrelation profiles; and (f) correcting a phase error of the signal despread in step (c), by using the SCP and the estimated timing error.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: September 22, 2009
    Assignee: ITT Manufacturing Enterprises, Inc.
    Inventor: Donald John Rasmussen
  • Publication number: 20080101442
    Abstract: A simplified timing correction method is provided for data despreading of serial offset quadrature pulse-shaped spread signals. The simplified timing correction algorithm is applied to a rake receiver for improved performance in a multi-path channel. Serial formatting of the spreading modulation waveform is selected to reduce the SYNC/serial probe correlation complexity. The method includes the steps of: (a) decimating serial inphase (I) and quadrature (Q) signals to form decimated I and Q even samples and decimated I and Q odd samples; (b) obtaining an autocorrelation profile of a spreading sequence used by the receiver; (c) detecting a synchronization starting point using the I and Q even samples; and (d) deciding to either move, or not move, the synchronization starting point, based on the autocorrelation profile obtained in step (b). Step (d) decides to move the synchronization starting point, and uses the I and Q odd samples for subsequent despreading of the I and Q signals.
    Type: Application
    Filed: December 21, 2005
    Publication date: May 1, 2008
    Inventor: Donald John Rasmussen
  • Publication number: 20080064954
    Abstract: Novel methods and imaging agents for functional imaging of lymph structures are disclosed herein. Embodiments of the methods utilize highly sensitive optical imaging and fluorescent spectroscopy techniques to track or monitor packets of organic dye flowing in one or more lymphatic structures. The packets of organic dye may be tracked to provide quantitative information regarding lymph propulsion and function. In particular, lymph flow velocity and pulse frequency may be determined using the disclosed methods.
    Type: Application
    Filed: August 24, 2007
    Publication date: March 13, 2008
    Applicant: BAYLOR COLLEGE OF MEDICINE
    Inventors: Kristen Adams, Ruchi Sharma, John Rasmussen, Eva Sevick-Muraca
  • Publication number: 20060159455
    Abstract: Methods and systems for using a wavelength as an address in an optical network are disclosed. In particular, methods for selecting a wavelength for a particular node in an optical network, resolving a wavelength for a destination node in an optical network from a network address, and receiving and transmitting data packets at particular wavelengths are disclosed. A resulting system implementing such methods may significantly reduce space, weight and power measurements while transferring data at high rates for a data network.
    Type: Application
    Filed: January 18, 2006
    Publication date: July 20, 2006
    Inventors: David Drury, Daniel Flynn, Eric Helmsen, John Rasmussen, Stephen Bachor
  • Patent number: 6846198
    Abstract: A multiple cable connector for use with multiple remote control devices requiring multi-poled contact connectors for each device. The connector of the invention allows for control of multiple parallel or independent devices to reduce the number of control cables required back to a central controller. Each connector is provided with a multi-pole control unit with a remote pass through interface connector head between a single female connector and associated male contact device.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: January 25, 2005
    Inventor: John Rasmussen
  • Publication number: 20030172368
    Abstract: A system, including software components, that efficiently and dynamically analyzes changes to data sources, including application programs, within an integration environment and simultaneously re-codes dynamic adapters between the data sources is disclosed. The system also monitors at least two of said data sources to detect similarities within the data structures of said data sources and generates new dynamic adapters to integrate said at least two of said data sources. The system also provides real time error validation of dynamic adapters as well as performance optimization of newly created dynamic adapters that have been generated under changing environmental conditions.
    Type: Application
    Filed: December 23, 2002
    Publication date: September 11, 2003
    Inventors: Elizabeth Alumbaugh, Yuri Adrian Tijerino Bohorquez, Mary Elizabeth Bain, Ronald Joseph Reynolds, Steven John Rasmussen, David Eugene Lucky
  • Publication number: 20030006295
    Abstract: The invention relates to an assembly for a spaying apparatus (10) which includes a ducting assembly (11) mountable about a fan (24), said ducting assembly (11) includes a plurality of ducts (28) formed by a plurality of vanes (29), each of said vanes (29) has a substantially constant width from a duct inlet (32) to a duct outlet (17, 18); a guide member locatable adjacent the ducting assembly (11) and on which the fan (24) is mountable, said guide member (33a) is shaped to direct fan forced air from the guide member (33a) to the duct inlet (32); and spray supply means (19) for providing ducted air with liquid to form spray.
    Type: Application
    Filed: June 3, 2002
    Publication date: January 9, 2003
    Inventors: Glenn Kenny, Lauritz John Rasmussen, Warren Lyell Duthie
  • Patent number: 5587536
    Abstract: A differential pressure control switch system for use in determining the relative position of a piston in a pneumatic cylinder in relation to a pre-set threshold pressure sensing by the differential in the supply side and exhaust side of a double acting pneumatic cylinder and a four-way directional control valve associated therewith.
    Type: Grant
    Filed: August 17, 1995
    Date of Patent: December 24, 1996
    Inventor: John Rasmussen
  • Patent number: 5531241
    Abstract: A condensate removal device for capturing, measuring and removing condensate from a fluid system having air or gas under pressure. The device purges only condensate on demand without loss of relative pressure inherent within the system. A differential pressure sensor senses the low and high level of condensate in a condensate collection reservoir activating a diaphragm type discharge valve venting condensate from the reservoir. Once condensate levels fall below a pre-determined level within the reservoir the valve is closed awaiting accumulation of additional condensate before cycling again.
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: July 2, 1996
    Inventor: John Rasmussen
  • Patent number: 5469879
    Abstract: A condensate removal device for capturing, measuring and removing condensate from a fluid system having air or gas under pressure. The device purges only condensate on demand without loss of relative pressure inherent within the system. A single sensing probe extends into a condensate collection reservoir sensing the low and high level of condensate activating a diaphragm type discharge value venting condensate from the reservoir. Once condensate levels fall below a pre-determined level within the reservoir the value is closed awaiting accumulation of additional condensate before cycling again.
    Type: Grant
    Filed: May 23, 1994
    Date of Patent: November 28, 1995
    Inventor: John Rasmussen
  • Patent number: 5378323
    Abstract: This invention comprises a method and apparatus for removing oil and tar based wood preservatives from sawdust. A pole treated with oil or tar basee wood preservative is shaved to remove the treated outer wood layer, leaving the interior preservative free. The sawdust is subjected to rapid heating in a turbulent oxygen-free gas stream and the oil and tar are rapidly distilled from the sawdust. The sawdust and gas are separated in a mechanical separator and the hot gas is rapidly cooled, condensed and recovered.
    Type: Grant
    Filed: July 22, 1993
    Date of Patent: January 3, 1995
    Assignee: Worthing Industries, Inc.
    Inventors: Peter Fransham, John Rasmussen, Stan Ainslie
  • Patent number: 4246802
    Abstract: A friction drive mechanism, in which two axially displaced sets of rolling members arranged in a common two-part holder are in external frictional engagement with a smooth shaft, the rolling members being inclined relative to the shaft to perform a rolling movement thereon by relative rotational movement between the holder and the shaft, the two holder parts being clamped together by a hinge joint providing an automatical load-dependent bias and adjustment of the frictional engagement between the rolling members and the shaft.
    Type: Grant
    Filed: August 7, 1978
    Date of Patent: January 27, 1981
    Inventors: John Rasmussen, Ole Hauberg
  • Patent number: D414336
    Type: Grant
    Filed: August 19, 1998
    Date of Patent: September 28, 1999
    Assignee: INTERLEGO AG
    Inventor: John Rasmussen