Patents by Inventor A. Craig Beal
A. Craig Beal 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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Publication number: 20230370081Abstract: Methods and devices for processing a signal. The methods include supplying to a first modulator a first RF signal and a first optical signal, wherein the first modulator is configured to output a first output signal; generating a first intensity signal that is based on the first output signal, wherein the first intensity signal is further based on a first biasing parameter; and providing a first intensity signal to a first analog-to-digital converter (ADC) to create a first digital signal processable by a signal processing unit.Type: ApplicationFiled: May 9, 2023Publication date: November 16, 2023Inventors: Caleb Christensen, A. Craig Beal, Mark Lucas, Michael LaGasse, Audrius Berzanskis
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Patent number: 11463174Abstract: RF processing systems and methods. An RF processing system includes an optical storage module, a processing module, and an electro-optical modulation module. The electro-optical modulation module is configured to receive the first signal from the optical storage module, receive the modulation signal from the processing module, and electro-optically modulate the first signal based on the modulation signal.Type: GrantFiled: April 14, 2020Date of Patent: October 4, 2022Assignee: MagiQ Technologies, Inc.Inventors: Michael LaGasse, Alan Craig Beal, Mark David Lucas
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Patent number: 10630391Abstract: RF processing systems and methods. An RF processing system includes an optical storage module, a processing module, and an electro-optical modulation module. The electro-optical modulation module is configured to receive the first signal from the optical storage module, receive the modulation signal from the processing module, and electro-optically modulate the first signal based on the modulation signal.Type: GrantFiled: November 21, 2018Date of Patent: April 21, 2020Assignee: MagiQ Technologies, Inc.Inventors: Michael LaGasse, Alan Craig Beal, Mark David Lucas
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Patent number: 9867408Abstract: A knee pad provided for engagement to a user in an as-worn position with an interior surface surrounding the front of the user's knee. A plurality of projections extend from the body and are made of compressible material to provide a cushioned support to the knees of the user during use.Type: GrantFiled: March 20, 2014Date of Patent: January 16, 2018Inventors: David Pratson, Craig Beal, D. J. Moore
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Patent number: 9506739Abstract: A method determines a distance with a specified accuracy. The method transmits to an interferometer a test signal oscillating with a test frequency and receives, in response to the transmitting, an interferometric signal formed by interfering the test signal with a delayed signal produced by delaying a copy of the test signal over the distance equal to a path length difference in the interferometer. The test frequency is varying such that the test signal oscillates with different values of the test frequency. The method determines at least two values of the test frequency corresponding to particular values of the interferometric signal by beating the test signal with a reference signal having a reference frequency, wherein a value of the reference frequency is an absolute value predetermined with the specified accuracy. The method determines the distance using the two values of the test frequency.Type: GrantFiled: December 21, 2013Date of Patent: November 29, 2016Assignee: MagiQ Technologies, Inc.Inventors: Caleb A Christensen, Anton Zavriyev, A. Craig Beal
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Patent number: 9207339Abstract: Disclosed is an optical seismic sensor system for measuring seismic events in a geological formation, including a surface unit for generating and processing an optical signal, and a sensor device optically connected to the surface unit for receiving the optical signal over an optical conduit. The sensor device includes at least one sensor head for sensing a seismic disturbance from at least one direction during a deployment of the sensor device within a borehole of the geological formation. The sensor head includes a frame and a reference mass attached to the frame via at least one flexure, such that movement of the reference mass relative to the frame is constrained to a single predetermined path.Type: GrantFiled: January 23, 2013Date of Patent: December 8, 2015Assignee: Magi-Q Technologies, Inc.Inventors: A Craig Beal, Malcolm E Cummings, Anton Zavriyev, Caleb A Christensen, Keun Lee
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Publication number: 20150331109Abstract: A method determines a distance with a specified accuracy. The method transmits to an interferometer a test signal oscillating with a test frequency and receives, in response to the transmitting, an interferometric signal formed by interfering the test signal with a delayed signal produced by delaying a copy of the test signal over the distance equal to a path length difference in the interferometer. The test frequency is varying such that the test signal oscillates with different values of the test frequency. The method determines at least two values of the test frequency corresponding to particular values of the interferometric signal by beating the test signal with a reference signal having a reference frequency, wherein a value of the reference frequency is an absolute value predetermined with the specified accuracy. The method determines the distance using the two values of the test frequency.Type: ApplicationFiled: December 21, 2013Publication date: November 19, 2015Inventors: Caleb A. Christensen, Anton Zavriyev, A. Craig Beal
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Publication number: 20140283275Abstract: A knee pad provided for engagement to a user in an as-worn position with an interior surface surrounding the front of the user's knee. A plurality of projections extend from the body and are made of compressible material to provide a cushioned support to the knees of the user during use.Type: ApplicationFiled: March 20, 2014Publication date: September 25, 2014Inventors: David Pratson, Craig Beal, D.J. Moore
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Publication number: 20140202786Abstract: Disclosed is an optical seismic sensor system for measuring seismic events in a geological formation, including a surface unit for generating and processing an optical signal, and a sensor device optically connected to the surface unit for receiving the optical signal over an optical conduit. The sensor device includes at least one sensor head for sensing a seismic disturbance from at least one direction during a deployment of the sensor device within a borehole of the geological formation. The sensor head includes a frame and a reference mass attached to the frame via at least one flexure, such that movement of the reference mass relative to the frame is constrained to a single predetermined path.Type: ApplicationFiled: January 23, 2013Publication date: July 24, 2014Inventors: A Craig Beal, Malcolm E. Cummings, Anton Zavriyev, Caleb A. Christensen, Keun Lee
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Patent number: 7853020Abstract: Systems and methods for enhanced quantum key distribution (QKD) using an actively compensated QKD system. The method includes exchanging quantum signals between first and second QKD stations and measuring the quantum signal error. An error signal SE representative of the system visibility error is then generated. An error-signal threshold STH that defines a system visibility error limit is then selected. Those qubits measured with the condition SE>STH are called “above-threshold” qubits, while those qubits measured with the condition SE?STH are called “below-threshold” qubits. Only below-threshold qubits are stored and used to form the final quantum key. This is accomplished by sending a blanking signal SB to the memory unit where the qubits are stored. The blanking signal prevents above-threshold qubits from being stored therein. The raw quantum key so formed has few errors and thus forms a longer final quantum key for a given number of exchanged quantum signals.Type: GrantFiled: September 19, 2007Date of Patent: December 14, 2010Assignee: Mogiq Technologies, Inc.Inventors: A. Craig Beal, Michael J. Lagasse, Audrius Berzanskis
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Publication number: 20100241912Abstract: A fast bit-error rate (F-BER) calculation mode for a QKD system is disclosed, wherein the method includes establishing versions of a sifted key in respective sifted-bits (SB) buffers in respective QKD stations (Alice and Bob). The method also includes sending Alice's version of the sifted key to Bob, and Bob performing a comparison of the two sifted key versions. The number of bit errors between the two sifted key versions relative to the length of the sifted key yields the F-BER. The F-BER is calculated much more quickly than the conventional BER calculation (“N-BER”), which involves performing a relatively complex error-correction algorithm. The F-BER calculation mode is particularly useful in quickly setting up and/or calibrating a QKD system, and can be repeated quickly to provide updated BER measurements after each QKD system adjustment.Type: ApplicationFiled: April 4, 2006Publication date: September 23, 2010Inventors: Brandon Kwok, A. Craig Beal, Audrius Berzanskis, Wensheng Sun
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Patent number: 7570420Abstract: Systems and methods for transmitting quantum and classical signals over an optical network are disclosed, wherein the quantum signal wavelength either falls within the classical signal wavelength band, or is very close to one of the classical signal wavelengths. The system includes a deep-notch optical filter with a blocking bandwidth that includes the quantum signal wavelength but not any of the classical signal wavelengths. The deep-notch optical filtering is applied to the classical signals prior to their being multiplexed with the quantum signals to prevent noise generated by the classical signals from adversely affecting transmission of quantum signals in the transmission optical fiber. Narrow-band filtering is also applied to the quantum signals prior to their detection in order to substantially exclude spurious non-quantum-signal wavelengths that arise from non-linear effects in the optical fiber.Type: GrantFiled: May 11, 2007Date of Patent: August 4, 2009Assignee: MagiQ Technologies, Inc.Inventors: A. Craig Beal, Michael J. LaGasse
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Publication number: 20090185689Abstract: Systems and methods for performing quantum key distribution (QKD) that allow for an improved signal-to-noise ratio (SNR) when providing active compensation for differences that arise in the system's relative optical paths. The method includes generating at one QKD station (Alice) a train of quantum signals having a first wavelength and interspersing one or more strong control signals having a second wavelength in between the quantum signals. Only the quantum signals are modulated when the quantum and control signals travel over the first optical path at Alice. The quantum and control signals are sent to Bob, where only the quantum signals are modulated as both signal types travel over a second optical path at Bob. The control signals are directed to two different photodetectors by an optical splitter. The proportion of optical power detected by each photodetector represents the optical path difference between the first and second optical paths.Type: ApplicationFiled: January 18, 2008Publication date: July 23, 2009Inventor: A. Craig Beal
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Publication number: 20090074192Abstract: Systems and methods for enhanced quantum key distribution (QKD) using an actively compensated QKD system. The method includes exchanging quantum signals between first and second QKD stations and measuring the quantum signal error. An error signal SE representative of the system visibility error is then generated. An error-signal threshold STH that defines a system visibility error limit is then selected. Those qubits measured with the condition SE>STH are called “above-threshold” qubits, while those qubits measured with the condition SE?STH are called “below-threshold” qubits. Only below-threshold qubits are stored and used to form the final quantum key. This is accomplished by sending a blanking signal SB to the memory unit where the qubits are stored. The blanking signal prevents above-threshold qubits from being stored therein. The raw quantum key so formed has few errors and thus forms a longer final quantum key for a given number of exchanged quantum signals.Type: ApplicationFiled: September 19, 2007Publication date: March 19, 2009Inventors: A. Craig Beal, Michael J. Lagasse, Audrius Berzanskis
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Publication number: 20090016736Abstract: Systems and methods for transmitting quantum and classical signals over an optical network are disclosed, wherein the quantum signal wavelength either falls within the classical signal wavelength band, or is very close to one of the classical signal wavelengths. The system includes a deep-notch optical filter with a blocking bandwidth that includes the quantum signal wavelength but not any of the classical signal wavelengths. The deep-notch optical filtering is applied to the classical signals prior to their being multiplexed with the quantum signals to prevent noise generated by the classical signals from adversely affecting transmission of quantum signals in the transmission optical fiber. Narrow-band filtering is also applied to the quantum signals prior to their detection in order to substantially exclude spurious non-quantum-signal wavelengths that arise from non-linear effects in the optical fiber.Type: ApplicationFiled: May 11, 2007Publication date: January 15, 2009Inventors: A. Craig Beal, Michael J. LaGasse
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Publication number: 20080137858Abstract: Systems and methods that allow for transmitting qubits and classical signal over the same channel of an optical telecommunications network that includes an optical fiber. The method includes sending the qubits of wavelength ?S over a quantum optical path that includes the optical fiber during a time interval ?T0 when there are no classical optical signals of wavelength ?S traveling over the optical fiber. The method also includes sending the classical signals over a classical optical path that includes the optical fiber, wherein the classical signals are sent outside of the time interval ?T0 to avoid interfering with the qubit transmission. Systems and methods for using the present invention to form quantum key banks for encrypting classical signals sent over the optical telecommunications network are also disclosed.Type: ApplicationFiled: December 4, 2007Publication date: June 12, 2008Inventors: Robert Gelfond, A. Craig Beal, Audrius Berzanskis, Joseph E. Gortych
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Patent number: 7254295Abstract: An optical fiber interferometer (10) with relaxed loop tolerance, and a quantum key distribution (QKD) system (200) using same is disclosed. The interferometer includes two optical fiber loops (LP1 and LP2). The loops have an optical path length (OPL) difference between them. A polarization-maintaining (PM) optical fiber section (60) of length (L60) and having fast and slow optical axes (AF and AS) optically couples the two loops. The length and fast-slow axis orientation is selected to introduce a time delay (?T1-2) between orthogonally polarized optical pulses traveling therethrough that compensates for the OPL difference. This allows for drastically relaxed tolerances when making the loops, leading to easier and more cost-effective manufacturing of the interferometer as well as related devices such as a optical-fiber-based QKD system.Type: GrantFiled: November 21, 2005Date of Patent: August 7, 2007Assignee: MagiQ Technologies, Inc.Inventors: Alexei Trifonov, A. Craig Beal
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Patent number: 7248695Abstract: Systems and methods for transmitting quantum and classical signals over an optical network are disclosed, wherein the quantum signal wavelength either falls within the classical signal wavelength band, or is very close to one of the classical signal wavelengths. The system includes a deep-notch optical filter with a blocking bandwidth that includes the quantum signal wavelength but not any of the classical signal wavelengths. The deep-notch optical filtering is applied to the classical signals prior to their being multiplexed with the quantum signals to prevent noise generated by the classical signals from adversely affecting transmission of quantum signals in the transmission optical fiber. Narrow-band filtering is also applied to the quantum signals prior to their detection in order to substantially exclude spurious non-quantum-signal wavelengths that arise from non-linear effects in the optical fiber.Type: GrantFiled: February 10, 2006Date of Patent: July 24, 2007Assignee: MagiQ Technologies, Inc.Inventors: A. Craig Beal, Michael J. LaGasse
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Publication number: 20070019499Abstract: A concrete mixer truck includes a truck chassis having a cab mounted at the front of the chassis. A mixing drum adapted to receive, mix and dispense concrete is mounted at a rear end of the chassis. The drum has a discharge end which faces the cab. A collector is located above the cab roof and is spaced apart from the mixing drum. A conveyor device mounted on a support frame is located generally between the cab and the drum and is utilized to transport concrete from the discharge end of said mixing drum up an inclined slope to the collector. A placement chute system directs a gravity flow of concrete from said collector to a desired location. The mixer truck utilizes the chassis, drum and other components of a standard rear discharge mixer truck to create a new type of front discharge mixer which has many of the advantages of existing front discharge mixer trucks at a reduced cost.Type: ApplicationFiled: July 21, 2005Publication date: January 25, 2007Inventors: Brett Shumaker, Allen Thomas, Craig Beal, Matthew Keiser, Robert Decker, Steven Shooter