Patents by Inventor Long Doan

Long Doan 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).

  • Publication number: 20050271436
    Abstract: One embodiment of a document feeder comprises a chassis that includes an outer surface that defines a path that changes a direction of a media by at least 90° and an inner surface that defines a chassis cavity, and a roller positioned at least partially within said cavity for advancing a media at least partially along the path.
    Type: Application
    Filed: June 2, 2004
    Publication date: December 8, 2005
    Inventors: Justine Worley, Kevin Bokelman, Long Doan
  • Publication number: 20050263954
    Abstract: A sheet handling assembly includes a frame, a first assembly, and a second assembly, each assembly rotatably supported by the frame and configured to contactingly transport sheet media. A member is configured to rotate the second assembly in response to rotation of the member in a first direction. The frame is configured to pivot in the first direction in response to rotating the member in the first direction, and pivot in a second direction, opposite the first direction, in response to rotating the member in the second direction.
    Type: Application
    Filed: June 1, 2004
    Publication date: December 1, 2005
    Inventors: A. Worley, Long Doan, Kevin Bokelman, Allan Donley
  • Patent number: 5793388
    Abstract: A method for operating an ink jet printer that includes the steps of performing a printer turn-on printhead service on a printhead cartridge of the printer; resetting a page counter, an uncapped condition time counter, and an ink drop counter, wherein the page counter counts the number of pages printed, the uncapped condition time counter counts the amount of time that the printhead cartridge is in the uncapped condition, and the ink drop counter counts the number of ink drops emitted by the printhead cartridge; printing a plurality of pages of print media; after a page is printed performing a post-prime printhead service if the printhead cartridge was primed during the printing of the page; and after a page is printed performing a print time printhead service if the printhead cartridge was not primed during the printing of the page and if (a) the ink jet printer has printed at least a predetermined number of pages since the page count counter was reset, (b) the printhead cartridge has been uncapped for at le
    Type: Grant
    Filed: March 6, 1995
    Date of Patent: August 11, 1998
    Assignee: Hewlett-Packard Company
    Inventors: Paul E. Martinson, Long Doan, Richard A. Becker, William S. Osborne