Patents by Inventor Thomas Liu
Thomas Liu 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: 20120169568Abstract: Various embodiments of an antenna structure for mobile devices are described. In one or more embodiments a multi-band antenna includes first, second and third resonating elements. The first and second resonating elements may each have an L-shape, and may be fed by a single feed leg. The third resonating element may be coupled to ground. In some embodiments, the first resonating element may be longer than the second resonating element, and the third resonating element may be positioned adjacent to the first resonating element. In other embodiments, a tuning element is coupled to the signal feed and is positioned adjacent to the second resonating element. The tuning element may have a geometry that is similar to a geometry of the second resonating element. The combination of these structures creates a plurality of distinct resonance modes which creases a wide effective bandwidth for the disclosed antenna. Other embodiments are described and claimed.Type: ApplicationFiled: January 3, 2011Publication date: July 5, 2012Applicant: PALM, INC.Inventors: Sung-Hoon Oh, Thomas Liu, Thorsten Hertel
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Publication number: 20120154222Abstract: Various embodiments of an antenna structure for mobile devices are described. In one or more embodiments a multi-band antenna includes a grounded parasitic element. In some embodiments, a high band arm is provided, and is fed off-center, so that the resonating arms are not symmetrical in length. In some embodiments, a coupled ground resonator is included to add a differential resonating mode. A ground leg may be included to offer facilitate impedance and inductance matching. The combination of these structures creates four distinct resonance modes for the high band, which creases a wide effective bandwidth for the disclosed antenna. Other embodiments are described and claimed.Type: ApplicationFiled: December 17, 2010Publication date: June 21, 2012Applicant: PALM, INC.Inventors: Sung-Hoon Oh, Thomas Liu, Thorsten Hertel
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Publication number: 20100240983Abstract: Techniques, systems and apparatus are described for magnetic resonance imaging. A magnetic resonance imaging (MRI) system comprises a scanner comprising a magnet, gradient coils and a radio frequency (RF) system to perform various operations. The scanner can apply a gradient field and a train of RF pulses comprising more than two phases to tag a target blood vessel, and acquire magnetic resonance signals based on the applied train of RF pulses to sample the more than two phases. The MRI system includes a data processing system in communication with the scanner to receive the acquired magnetic resonance signals and process the received magnetic resonance signal to generate images proportional to perfusion.Type: ApplicationFiled: March 19, 2010Publication date: September 23, 2010Inventors: Youngkyoo Jung, Eric C. Wong, Thomas Liu
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Patent number: 7587233Abstract: Techniques for providing velocity-selective magnetic arterial spin labeling in magnetic resonance imaging (MRI) without spatial selectivity. In one implementation, an RF pulse train is applied to selectively tag spins according to velocities of the spins without selection based on locations of the spins. MRI images of tagged spins at an area of interest are then acquired to obtain information on perfusion at the area of interest.Type: GrantFiled: May 13, 2003Date of Patent: September 8, 2009Assignee: The Regents of the University of CaliforniaInventors: Eric C. Wong, Thomas Liu
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Publication number: 20090056396Abstract: An anti-theft pin tumbler lock includes a lock core and a lock body having a bore and at least one first bore. The lock core includes a keyway mounted therein, and one second bore formed therein and aligned with at least one first bore. One spring, one pin and one tumbler are sequentially received in the first and second bores and blocked using one plug. At least one second bore is configured in a stepped form, in which a diameter of one end is larger than that of another one, and the tumbler is configured in a corresponding form, in which the relative large diameter end thereof lies in the larger diameter second bore, while the relative small diameter end lies in the smaller diameter bore. An anti-bump space between the smaller diameter end and the end of the second bore adjacent to keyway is created.Type: ApplicationFiled: October 24, 2007Publication date: March 5, 2009Inventor: Man Leung Thomas Liu
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Patent number: 7403160Abstract: A low profile smart antenna includes an active antenna element carried by a dielectric substrate, and active antenna element has a T-shape. Passive antenna elements are carried by the dielectric substrate, and they have an inverted L-shaped portion laterally adjacent the active antenna element. Impedance elements are selectively connectable to the passive antenna elements for antenna beam steering.Type: GrantFiled: June 16, 2005Date of Patent: July 22, 2008Assignee: Interdigital Technology CorporationInventors: Bing A. Chiang, Michael J. Lynch, Douglas H. Wood, Thomas Liu, Govind R. Kadambi, Mark W. Kishler
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Patent number: 7180465Abstract: A smart antenna includes an active antenna element, a passive antenna element laterally adjacent the active antenna element, and an impedance element selectively connectable to the passive antenna element for antenna beam steering. A ground plane includes a center portion adjacent the active antenna element, and first and second arms extending outwardly from the center portion. The first arm is connected to the impedance element, and the second arm is laterally adjacent the first arm.Type: GrantFiled: August 11, 2005Date of Patent: February 20, 2007Assignee: InterDigital Technology CorporationInventors: Michael J. Lynch, Thomas Liu, Bing A. Chiang, Govind R. Kadambi
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Publication number: 20060044205Abstract: A smart antenna includes an active antenna element, a passive antenna element laterally adjacent the active antenna element, and an impedance element selectively connectable to the passive antenna element for antenna beam steering. A ground plane includes a center portion adjacent the active antenna element, and first and second arms extending outwardly from the center portion. The first arm is connected to the impedance element, and the second arm is laterally adjacent the first arm.Type: ApplicationFiled: August 11, 2005Publication date: March 2, 2006Applicant: InterDigital Technology CorporationInventors: Michael Lynch, Thomas Liu, Bing Chiang, Govind Kadambi
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Publication number: 20050280589Abstract: A low profile smart antenna includes an active antenna element carried by a dielectric substrate, and active antenna element has a T-shape. Passive antenna elements are carried by the dielectric substrate, and they have an inverted L-shaped portion laterally adjacent the active antenna element. Impedance elements are selectively connectable to the passive antenna elements for antenna beam steering.Type: ApplicationFiled: June 16, 2005Publication date: December 22, 2005Applicant: InterDigital Technology CorporationInventors: Bing Chiang, Michael Lynch, Douglas Wood, Thomas Liu, Govind Kadambi, Mark Kishler
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Publication number: 20050277825Abstract: Techniques for providing velocity-selective magnetic arterial spin labeling in magnetic resonance imaging (MRI) without spatial selectivity. In one implementation, an RF pulse train is applied to selectively tag spins according to velocities of the spins without selection based on locations of the spins. MRI images of tagged spins at an area of interest are then acquired to obtain information on perfusion at the area of interest.Type: ApplicationFiled: May 13, 2003Publication date: December 15, 2005Inventors: Eric Wong, Thomas Liu
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Patent number: 6363033Abstract: A digital transmit beamformer system with multiple beam transmit capability has a plurality of multi-channel transmitters, each channel with a source of sampled, complex-valued initial waveform information representative of the ultimate desired waveform to be applied to one or more corresponding transducer elements for each beam. Each multi-channel transmitter applies beamformation delays and apodization to each channel's respective initial waveform information digitally, digitally modulates the information by a carrier frequency, and interpolates the information to the DAC sample rate for conversion to an analog signal and application to the associated transducer element(s). The beamformer transmitters can be programmed per channel and per beam with carrier frequency, delay, apodization and calibration values, For pulsed wave operation, pulse waveform parameters can be specified to the beamformer transmitters on a per firing basis, without degrading the scan frame rate to non-useful diagnostic levels.Type: GrantFiled: August 28, 2000Date of Patent: March 26, 2002Assignee: Acuson CorporationInventors: Christopher R. Cole, Albert Gee, Thomas Liu
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Patent number: 6338099Abstract: A device code recognizing circuit includes a microprocessor forming an array having input pins and output pins and a code generation circuit connected to the microprocessor. The code generation circuit includes signal input terminals connected to input pins of the array and signal output terminals connected to I/O terminals of the microprocessor. The signal output terminals are sequentially and selectively set to one of low level condition and high impedance condition. The input pins of the microprocessor to which the signal input terminals of the code generation circuit are connected serially read signals from the code generation circuit for provision the signals to the microprocessor to form a device code associated therewith.Type: GrantFiled: July 9, 1999Date of Patent: January 8, 2002Assignee: Behavior Tech Computer Corp.Inventor: Thomas Liu
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Patent number: 6172939Abstract: A digital transmit beamformer system with multiple beam transmit capability has a plurality of multi-channel transmitters, each channel with a source of sampled, complex-valued initial waveform information representative of the ultimate desired waveform to be applied to one or more corresponding transducer elements for each beam. Each multi-channel transmitter applies beamformation delays and apodization to each channel's respective initial waveform information digitally, digitally modulates the information by a carrier frequency, and interpolates the information to the DAC sample rate for conversion to an analog signal and application to the associated transducer element(s). The beamformer transmitters can be programmed per channel and per beam with carrier frequency, delay, apodization and calibration values. For pulsed wave operation, pulse waveform parameters can be specified to the beamformer transmitters on a per firing basis, without degrading the scan frame rate to non-useful diagnostic levels.Type: GrantFiled: October 12, 1999Date of Patent: January 9, 2001Assignee: Acuson CorporationInventors: Christopher R. Cole, Albert Gee, Thomas Liu
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Patent number: 6104673Abstract: A digital transmit beamformer system with multiple beam transmit capability has a plurality of multi-channel transmitters, each channel with a source of sampled, complex-valued initial waveform information representative of the ultimate desired waveform to be applied to one or more corresponding transducer elements for each beam. Each multi-channel transmitter applies beamformation delays and apodization to each channel's respective initial waveform information digitally, digitally modulates the information by a carrier frequency, and interpolates the information to the DAC sample rate for conversion to an analog signal and application to the associated transducer element(s). The beamformer transmitters can be programmed per channel and per beam with carrier frequency, delay, apodization and calibration values. For pulsed wave operation, pulse waveform parameters can be specified to the beamformer transmitters on a per firing basis, without degrading the scan frame rate to non-useful diagnostic levels.Type: GrantFiled: December 21, 1998Date of Patent: August 15, 2000Assignee: Acuson CorporationInventors: Christopher R. Cole, Albert Gee, Thomas Liu
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Patent number: 5995450Abstract: A digital transmit beamformer system with multiple beam transmit capability has a plurality of multi-channel transmitters, each channel with a source of sampled, complex-valued initial waveform information representative of the ultimate desired waveform to be applied to one or more corresponding transducer elements for each beam. Each multi-channel transmitter applies beamformation delays and apodization to each channel's respective initial waveform information digitally, digitally modulates the information by a carrier frequency, and interpolates the information to the DAC sample rate for conversion to an analog signal and application to the associated transducer element(s). The beamformer transmitters can be programmed per channel and per beam with carrier frequency, delay, apodization and calibration values. For pulsed wave operation, pulse waveform parameters can be specified to the beamformer transmitters on a per firing basis, without degrading the scan frame rate to non-useful diagnostic levels.Type: GrantFiled: April 27, 1998Date of Patent: November 30, 1999Assignee: Acuson CorporationInventors: Christopher R. Cole, Albert Gee, Thomas Liu
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Patent number: 5675554Abstract: A digital transmit beamformer system with multiple beam transmit capability has a plurality of multi-channel transmitters, each channel with a source of sampled, complex-valued initial waveform information representative of the ultimate desired waveform to be applied to one or more corresponding transducer elements for each beam. Each multi-channel transmitter applies beamformation delays and apodization to each channel's respective initial waveform information digitally, digitally modulates the information by a carrier frequency, and interpolates the information to the DAC sample rate for conversion to an analog signal and application to the associated transducer element(s). The beamformer transmitters can be programmed per channel and per beam with carrier frequency, delay, apodization and calibration values. For pulsed wave operation, pulse waveform parameters can be specified to the beamformer transmitters on a per firing basis, without degrading the scan frame rate to non-useful diagnostic levels.Type: GrantFiled: July 15, 1996Date of Patent: October 7, 1997Assignee: Acuson CorporationInventors: Christopher R. Cole, Albert Gee, Thomas Liu