Patents by Inventor Phillip Leroy Laffoon

Phillip Leroy Laffoon 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).

  • Ink jet printing system
    Patent number: 5767883
    Abstract: An ink jet printing system having an ink accumulator holding a supply of ink for delivery under pressure to printheads of the system, the volume of the supply decreasing as ink is delivered to the printheads, and a pump operable intermittently to pump ink from a supply to the accumulator when the volume in the accumulator decreases to a lower limit, operation of the pump being terminated when the volume in the accumulator increases to an upper limit.
    Type: Grant
    Filed: March 4, 1994
    Date of Patent: June 16, 1998
    Assignee: Diagraph Corporation
    Inventors: Anthony Bruce Castro, Phillip Leroy Laffoon, James Patrick Lawhorn, Gary Todd Suits