Patents by Inventor Harold D. Davidson

Harold D. Davidson 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).

  • Apparatus for a mobile support device for a pressure washer wand
    Patent number: 7185834
    Abstract: A mobile pressure washer wand support with a dolly-like wheeled base with a cut out slot for securely holding the pressure washer wand in place. This allows the user to have the weight of the pressure washer hose alleviated to reduce fatigue and backache. The user can place the pressure washer wand in the adjustable wand slot, tighten clamps to hold the wand in place, and simply point it in the direction that is desired to be sprayed.
    Type: Grant
    Filed: August 17, 2004
    Date of Patent: March 6, 2007
    Inventor: Harold D. Davidson
  • Controlled switching CMOS output buffer
    Patent number: 4818901
    Abstract: An output buffer initially operating its output transistors in a constant current mode in response to an input signal transition and subsequently operating its output transistors in a constant voltage drive mode as the output approaches the desried output level. The control electrode of the output transistor is controlled by a switchable voltage divider or current mirror. The control of an output transistor may not be activated until the other output transistor is turned off to prevent having both output devices on at the same time.
    Type: Grant
    Filed: July 20, 1987
    Date of Patent: April 4, 1989
    Assignee: Harris Corporation
    Inventors: William R. Young, Harold D. Davidson