Patents by Inventor Russel E. Walker

Russel E. Walker 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).

  • Electronic reader for reading a special characteristic of an object
    Patent number: 6611198
    Abstract: An object identification system and method detects the presence of a target object in a field of inspection and in one aspect of the invention, generates a first signal if the object is left in the field of inspection for more than a minimum threshold period of time. In a second aspect a second signal is generated if the object is introduced to the field of inspection more than a minimum threshold number of times (having been withdrawn from the field of inspection in the interim) within a minimum threshold period of time.
    Type: Grant
    Filed: October 1, 1999
    Date of Patent: August 26, 2003
    Assignee: Keri Systems Incorporated
    Inventors: Kenneth J. Geiszler, Russel E. Walker, Kenneth Alan Whiston, Jon Kwong, Dale Lindseth
  • Capacitively powered portable communication device and associated exciter/reader and related method
    Patent number: 6611199
    Abstract: A portable communication device uses a first electrostatic antenna element and a second electrostatic antenna element and circuitry which is coupled to the first antenna element and to the second antenna element and which derives operating power from an electrostatic field in the vicinity of the first and second antenna elements. The electrostatic field may be provided by an array of exciter elements containing both horizontal and vertical exciter elements so that at some point as a communication device is moved across the exciter antenna array, the device will have sufficient power coupled to it to power up and become operational.
    Type: Grant
    Filed: April 16, 1998
    Date of Patent: August 26, 2003
    Assignee: Motorola, Inc.
    Inventors: Theodore D. Geiszler, Larry W. Fort, George L. Lauro, Russel E. Walker, Noel H. Eberhardt, Victor Allen Vega, John H. Rolin, Sebastian Thomas Kakkanad, Richard R. Fletcher
  • Radio frequency identification system
    Patent number: 6411199
    Abstract: A radio frequency identification system includes a transponder and a transponder reader. The transponder, responsive to an interrogation signal continuously transmitted by the transponder reader, generates a transponder signal modulated by an identification signal readable by the transponder reader. The identification signal includes a synchronization portion, a data portion, an output format identification portion, and an error detection portion. The output format identification portion is used by the reader to configure itself for communication with an attached controller. In another aspect of the invention, the transponder reader may be configured to read FSK as well as PSK encoded signals from the transponder.
    Type: Grant
    Filed: August 21, 1998
    Date of Patent: June 25, 2002
    Assignee: Keri Systems, Inc.
    Inventors: Kenneth Geiszler, Russel E. Walker, Kenneth Alan Whiston, Jon Kwong, Dale Lindseth
  • Reader system for waste bin pickup vehicles
    Patent number: 5565846
    Abstract: A reader for radio frequency identification tags having at least one magnetic field transmitting and receiving coil which is oriented in a given plane and which is responsive to a received magnetic exciter field of a first frequency to produce and radiate an identifying magnetic field comprised of a carrier at a second different frequency modulated by an identifying code.
    Type: Grant
    Filed: September 26, 1994
    Date of Patent: October 15, 1996
    Assignee: Indala Corporation
    Inventors: Theodore D. Geiszler, Noel H. Eberhardt, Russel E. Walker, Herbert P. Radding