Patents by Inventor Dean Kawaguchi

Dean Kawaguchi 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: 9792470
    Abstract: One embodiment of the present invention includes a Radio Frequency Identification (RFID) reader configured to detect radio frequency (RF) interference in and/or outside a band of RFID operation. The RFID reader includes a receive channel for receiving incoming RF signals; and hardware for detecting interference in and/or outside a band of RFID operation. A method for mitigating radio frequency (RF) interference in and/or outside a band of RFID operation, according to one embodiment, includes detecting interference in and/or outside a band of RFID operation; and controlling an aspect of operation of the RFID reader for mitigating the detected interference.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: October 17, 2017
    Assignee: ZEST LABS, INC.
    Inventors: Dean Kawaguchi, Edward M. Farrell, Prasad Panchalan, Manu H. R. Rao
  • Patent number: 9406046
    Abstract: A method for associating an image of a document with information relating to a radio frequency identification (RFID) tag, according to one embodiment, includes receiving information relating to an RFID tag, the information including at least one of a trip identifier, an identifier of the RFID tag, an identifier of a transport item, and a document identifier; receiving an image of a document; storing the image of the document; associating the image of the document with the information relating to the RFID tag; and storing the association of the image with the information relating to the RFID tag.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: August 2, 2016
    Assignee: Intelleflex Corporation
    Inventors: Dean Kawaguchi, Peter Arnold Mehring
  • Patent number: 9361488
    Abstract: A method for subcarrier downconversion and data detection according to one embodiment includes determining whether to use an upper sideband frequency section of a complex downconverter output, a lower sideband frequency section of the complex downconverter output, or both sideband frequency sections of the complex downconverter output; and processing the output corresponding to the selected sideband frequency section or sections based on the determination, wherein the processing includes correlation and data detection. Such methodology may also be implemented as a system using logic for performing the various operations. Additional systems and methods are also presented.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: June 7, 2016
    Assignee: Intelleflex Corporation
    Inventor: Dean Kawaguchi
  • Patent number: 9230141
    Abstract: A method for estimating a strength of a radio frequency signal according to one embodiment includes receiving a correlator magnitude signal from a correlator module; performing a gain scaling on the correlator magnitude signal; and averaging the scaled correlator magnitude signal or value associated therewith to generate an output indicative of a strength of the signal. Such methodology may also be implemented as a system using logic for performing the various operations. Additional systems and methods are also presented.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: January 5, 2016
    Assignee: Intelleflex Corporation
    Inventor: Dean Kawaguchi
  • Patent number: 9224016
    Abstract: A method for processing baseband signals according to one embodiment includes receiving I and Q baseband signals; and selectively reducing an amount of samples of the baseband signals to be processed in a correlator, wherein the reduction rate is based on a data rate of the baseband signals. A preintegrator module according to one embodiment includes an automatic gain control section for performing automatic gain control on I and Q baseband signals; a first preintegrator coupled to an output of the automatic gain control section, the first preintegrator being for selectively reducing an amount of samples in the I baseband signal based on a data rate of the I baseband signal; and a second preintegrator coupled to an output of the automatic gain control section, the second preintegrator being for selectively reducing an amount of samples in the Q baseband signal based on a data rate of the Q baseband signal. Additional systems and methods are also presented.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: December 29, 2015
    Assignee: Intelleflex Corporation
    Inventor: Dean Kawaguchi
  • Patent number: 9202091
    Abstract: A media capture device coupled to an RFID reader and/or antenna. A system in one embodiment includes a Radio Frequency Identification (RFID) reader; an antenna coupled to the RFID reader; and a media capture device coupled to at least one of the reader and the antenna. A method in another embodiment includes capturing media using a media capture device coupled to at least one of a Radio Frequency Identification (RFID) reader and an antenna coupled to the RFID reader upon occurrence of a trigger event.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: December 1, 2015
    Assignee: Intelleflex Corporation
    Inventor: Dean Kawaguchi
  • Patent number: 9183418
    Abstract: A method for demodulating a data signal according to one embodiment includes processing baseband signals using multiple complex correlators each having a half-Tbit length; summing outputs of the complex correlators for a first data state; and differencing outputs of the complex correlators for a second data state. A system for demodulating a data signal according to one embodiment includes a correlator module having logic for: processing baseband signals using multiple complex correlators each having a half-Tbit length; summing outputs of the complex correlators for a first data state; and differencing outputs of the complex correlators for a second data state. Additional systems and methods are also presented.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: November 10, 2015
    Assignee: Intelleflex Corporation
    Inventor: Dean Kawaguchi
  • Patent number: 8994502
    Abstract: A method according to one embodiment includes conummicating with a radio frequency identification (RFID) tag coupled to a reusable transport item (RTI); and determining whether the RTI has passed a predetermined useful lifetime thereof based on information received from the RFID tag. A method according to one embodiment includes conummicating with a radio frequency identification (RFID) tag coupled to a reusable transport item (RTI); and determining both a horizontal and vertical position of the RTI. A method according to yet another embodiment includes communicating with a radio frequency identification (RFID) tag coupled to a reusable transport item (RTI); and performing an action based at least in part on at least one of a location and a determined inactivity of the RTI.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: March 31, 2015
    Assignee: Intelleflex Corporation
    Inventors: Dean Kawaguchi, Edward M. Farrell, Edmond Sardariani, Peter Arnold Mehring
  • Publication number: 20140253297
    Abstract: A method for associating an image of a document with information relating to a radio frequency identification (RFID) tag, according to one embodiment, includes receiving information relating to an RFID tag, the information including at least one of a trip identifier, an identifier of the RFID tag, an identifier of a transport item, and a document identifier; receiving an image of a document; storing the image of the document; associating the image of the document with the information relating to the RFID tag; and storing the association of the image with the information relating to the RFID tag.
    Type: Application
    Filed: March 5, 2014
    Publication date: September 11, 2014
    Applicant: Intelleflex Corporation
    Inventors: Dean Kawaguchi, Peter Arnold Mehring
  • Patent number: 8824607
    Abstract: A method for demodulating a radio frequency signal according to one embodiment includes receiving digital signals derived from a radio frequency signal; converting the digital signals to baseband signals; generating a frequency error signal using the baseband signals during an acquisition period; and shifting a frequency of the digital signals towards zero frequency error during the acquisition period using the frequency error signal, with the proviso that the digital signals are not phase locked during the shifting. Such methodology may also be implemented as a system using logic for performing the various operations. Additional systems and methods are also presented.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: September 2, 2014
    Assignee: Intelleflex Corporation
    Inventor: Dean Kawaguchi
  • Patent number: 8774329
    Abstract: A method for processing a signal derived from a radio frequency signal at some rate in a range of allowable data rates according to one embodiment includes downconverting an incoming signal derived from a radio frequency signal to complex near-baseband signals; processing the complex near-baseband signals in two data correlators corresponding to data 0 and data 1; and changing effective lengths of the correlators based on a symbol data rate of the incoming signal. Such methodology may also be implemented as a system using logic for performing the various operations. Additional systems and methods are also presented.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: July 8, 2014
    Assignee: Intelleflex Corporation
    Inventor: Dean Kawaguchi
  • Patent number: 8774710
    Abstract: A method for setting a signal detection threshold according to one embodiment includes determining a measure of a noise floor in a signal derived from a radio frequency signal received by an antenna using a same circuit used to detect a subcarrier signal during transmitting and prior to sending a command to a transponder to respond; and setting a signal detection threshold above the noise floor. Such methodology may also be implemented as a system using logic for performing the various operations. Additional systems and methods are also presented.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: July 8, 2014
    Assignee: Intelleflex Corporation
    Inventors: Dean Kawaguchi, Manu H. R. Rao
  • Patent number: 8731118
    Abstract: A method for jam setting an initial frequency of a data clock recovery loop according to one embodiment includes generating a frequency error signal in a frequency error detector from sideband signals within a backscattered radio frequency signal, wherein the frequency error accumulates in a frequency error filter coupled to an output of the frequency error detector; at about an end of an acquisition period, freezing the accumulated frequency error in the frequency error filter; and using the frozen accumulated frequency error to jam set an initial frequency of a data clock recovery loop. Such methodology may also be implemented as a system using logic for performing the various operations. Additional systems and methods are also presented.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: May 20, 2014
    Assignee: Intelleflex Corporation
    Inventor: Dean Kawaguchi
  • Patent number: 8723651
    Abstract: A method for detecting a pattern in a signal according to one embodiment includes determining a time between symbol transitions in a signal derived from a radio frequency signal; determining ratios of relational times between consecutive symbol transitions; and comparing a sequence of the ratios to a target pattern for determining whether the sequence corresponds to the target pattern. Such methodology may also be implemented as a system using logic for performing the various operations. Additional systems and methods are also presented.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: May 13, 2014
    Assignee: Intelleflex Corporation
    Inventor: Dean Kawaguchi
  • Patent number: 8717144
    Abstract: A system in one embodiment includes a plurality of Radio Frequency Identification (RFID) readers, each reader being capable of using a single antenna for both transmit and receive functions, wherein, during operation, one of the readers transmits and at least another of the readers receives a response to the transmission from an RFID device. A system in another embodiment includes a plurality of Radio Frequency Identification (RFID) readers, each reader having at least one antenna mounted on a housing thereof, wherein, during operation, the reader transmitting emits a signal sufficient to communicate with a battery assisted passive RFID device at a range of at least 20 meters. Additional systems and methods are also presented.
    Type: Grant
    Filed: April 29, 2008
    Date of Patent: May 6, 2014
    Assignee: Intelleflex Corporation
    Inventors: Dean Kawaguchi, Edward M. Farrell
  • Publication number: 20130257598
    Abstract: One embodiment of the present invention includes a Radio Frequency Identification (RFID) reader configured to detect radio frequency (RF) interference in and/or outside a band of RFID operation. The RFID reader includes a receive channel for receiving incoming RF signals; and hardware for detecting interference in and/or outside a band of RFID operation. A method for mitigating radio frequency (RF) interference in and/or outside a band of RFID operation, according to one embodiment, includes detecting interference in and/or outside a band of RFID operation; and controlling an aspect of operation of the RFID reader for mitigating the detected interference.
    Type: Application
    Filed: March 28, 2013
    Publication date: October 3, 2013
    Applicant: Intelleflex Corporation
    Inventors: Dean Kawaguchi, Edward M. Farrell, Prasad Panchalan, Manu H. R. Rao
  • Patent number: 8391824
    Abstract: A method for detecting an end of modulation in a backscattered radio frequency signal according to one embodiment includes generating a fast average of a magnitude or power of an incoming signal; generating a slow average of the magnitude or power of the incoming signal; determining an end of modulation based on a relationship between the fast and slow averages; and outputting an end of modulation signal upon determining the end of modulation. A system for detecting an end of modulation in a backscattered radio frequency signal according to one embodiment includes a window integrator for generating a fast moving average of a magnitude or power of an incoming signal; a leaky integrator for generating a slow moving average of the magnitude or power of the incoming signal; logic for determining an end of modulation when the fast moving average crosses below the slow moving average; and logic for outputting an end of modulation signal. Additional systems and methods are also presented.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: March 5, 2013
    Assignee: Intelleflex Corporation
    Inventor: Dean Kawaguchi
  • Publication number: 20120223814
    Abstract: A method according to one embodiment includes conummicating with a radio frequency identification (RFID) tag coupled to a reusable transport item (RTI); and determining whether the RTI has passed a predetermined useful lifetime thereof based on information received from the RFID tag. A method according to one embodiment includes conummicating with a radio frequency identification (RFID) tag coupled to a reusable transport item (RTI); and determining both a horizontal and vertical position of the RTI. A method according to yet another embodiment includes communicating with a radio frequency identification (RFID) tag coupled to a reusable transport item (RTI); and performing an action based at least in part on at least one of a location and a determined inactivity of the RTI.
    Type: Application
    Filed: March 2, 2012
    Publication date: September 6, 2012
    Applicant: INTELLEFLEX CORPORATION
    Inventors: Dean Kawaguchi, Edward M. Farrell, Edmond Sardariani, Peter Arnold Mehring
  • Patent number: 8204039
    Abstract: Described is a system comprising a first wireless device and a second wireless device. The first device has access to a packet routing table which includes data indicative of a packet transmission path in a wireless mesh communications network. The second wireless device is communicatively coupled to the first device and has access to the routing table. Upon receipt of a packet by the first device which is addressed to the second device, the first device determines, as a function of at least one of (i) the routing table and (ii) a first identifier of the second device, a second identifier of a third wireless device to receive the packet directly from the first device. At least one of the first, second and third devices updates the routing table.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: June 19, 2012
    Assignee: Symbol Technologies, Inc.
    Inventors: Robert Beach, Dean Kawaguchi, Ramesh Sekhar
  • Publication number: 20120056722
    Abstract: A media capture device coupled to an RFID reader and/or antenna. A system in one embodiment includes a Radio Frequency Identification (RFID) reader; an antenna coupled to the RFID reader; and a media capture device coupled to at least one of the reader and the antenna. A method in another embodiment includes capturing media using a media capture device coupled to at least one of a Radio Frequency Identification (RFID) reader and an antenna coupled to the RFID reader upon occurrence of a trigger event.
    Type: Application
    Filed: September 1, 2011
    Publication date: March 8, 2012
    Applicant: INTELLEFLEX CORPORATION
    Inventor: Dean Kawaguchi