Patents by Inventor David A Rehmann

David A Rehmann 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).

  • Encoder
    Patent number: 7463168
    Abstract: Various methods and apparatus relating to an encoder are disclosed.
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: December 9, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: David A. Rehmann, David K. Klaffenbach
  • Averaging signals
    Patent number: 7456386
    Abstract: A method for compensating for encoder wheel eccentricity includes routing encoding module signals to a signal logic module when an encoder wheel is not at slew, averaging the encoding module signals, by using the signal logic module, to form averaged signals, when the encoder wheel is at slew, and generating an output signal from the averaged signals and the encoding module signals, by using the signal logic module.
    Type: Grant
    Filed: October 3, 2005
    Date of Patent: November 25, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: David A. Rehmann
  • Light guide
    Patent number: 7411603
    Abstract: In embodiments, light from a light guide is used to generate a signal.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: August 12, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: David A. Rehmann
  • Multi-mode encoder output generator
    Patent number: 7352293
    Abstract: Various apparatus and methods of a multi-mode encoder output generator are disclosed.
    Type: Grant
    Filed: April 23, 2007
    Date of Patent: April 1, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: David A. Rehmann
  • Encoder
    Publication number: 20080024330
    Abstract: Various methods and apparatus relating to an encoder are disclosed.
    Type: Application
    Filed: July 21, 2006
    Publication date: January 31, 2008
    Inventors: David A. Rehmann, David K. Klaffenbach
  • Averaging signals
    Publication number: 20070075231
    Abstract: Embodiments of averaging signals are disclosed.
    Type: Application
    Filed: October 3, 2005
    Publication date: April 5, 2007
    Inventor: David Rehmann
  • Light guide
    Publication number: 20060227200
    Abstract: In embodiments, light from a light guide is used to generate a signal.
    Type: Application
    Filed: March 29, 2005
    Publication date: October 12, 2006
    Inventor: David Rehmann
  • System for ink short protection
    Patent number: 6631962
    Abstract: A system for ink short protection for signaling to inkjet printheads includes a differential signaling driver having a first and a second terminal, a differential signaling receiver having a first and a second terminal, a first capacitor in series between the first terminals, a second capacitor in series between the second terminals, and circuitry for reducing charge accumulation on the capacitors. A method for ink short protection and a printing mechanism having such an ink short protection system are also provided.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: October 14, 2003
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: David A Rehmann, Steven B Elgee
  • System for ink short protection
    Patent number: 6578940
    Abstract: A system for ink short protection for signaling to inkjet printheads includes a differential signaling driver having a first and a second terminal, a differential signaling receiver having a first and a second terminal, a first capacitor in series between the first terminals, a second capacitor in series between the second terminals, and circuitry for reducing charge accumulation on the capacitors. A method for ink short protection and a printing mechanism having such an ink short protection system are also provided.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: June 17, 2003
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: David A Rehmann, Steven B Elgee
  • SYSTEM FOR INK SHORT PROTECTION
    Publication number: 20030025740
    Abstract: A system for ink short protection for signaling to inkjet printheads includes a differential signaling driver having a first and a second terminal, a differential signaling receiver having a first and a second terminal, a first capacitor in series between the first terminals, a second capacitor in series between the second terminals, and circuitry for reducing charge accumulation on the capacitors. A method for ink short protection and a printing mechanism having such an ink short protection system are also provided.
    Type: Application
    Filed: July 25, 2001
    Publication date: February 6, 2003
    Inventors: David A. Rehmann, Steven B. Elgee
  • System for ink short protection
    Publication number: 20030020771
    Abstract: A system for ink short protection for signaling to inkjet printheads includes a differential signaling driver having a first and a second terminal, a differential signaling receiver having a first and a second terminal, a first capacitor in series between the first terminals, a second capacitor in series between the second terminals, and circuitry for reducing charge accumulation on the capacitors. A method for ink short protection and a printing mechanism having such an ink short protection system are also provided.
    Type: Application
    Filed: August 29, 2002
    Publication date: January 30, 2003
    Inventors: David A. Rehmann, Steven B. Elgee
  • Glossy or matte-finish media detector and method for use in a printing device
    Patent number: 6006668
    Abstract: A media detector for use in a printing device and method of differentiating between glossy-finish and matte-finish print media are disclosed. An embodiment of the media detector includes a source, sensor, and polarized filter. The source transmits an unpolarized first light signal and is positioned so that this signal is transmitted toward a sheet of print media at a first angle with respect to a normal to a surface of the sheet of print media. The sensor is positioned to detect an intensity of a reflected light signal from the sheet of print media. The polarized filter is positioned between the sensor and the sheet of print media so that the intensity of the reflected light signal detected by the sensor is less for a polarized reflected light signal than for an unpolarized reflected light signal. Polarization of the reflected light signal is dependent upon the first angle.
    Type: Grant
    Filed: April 20, 1998
    Date of Patent: December 28, 1999
    Assignee: Hewlett-Packard Company
    Inventor: David A. Rehmann