Patents by Inventor Charles B. Mitchell

Charles B. Mitchell 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).

  • Patent number: 5826412
    Abstract: An apparatus which is designed to improve the art of dallying. The apparatus is designed and configured to simulate the front end of a conventional saddle. This dallying apparatus comprises a front end connected to a back end via a middle portion. The front end includes the horn which extends upwards from the horn shoulder support, while the back end is secured to the removably secured to the user. This will provide for the horn to be situated in front of the user at the appropriate distance due to the middle portion. Accordingly, once attached, the user can practice and perfect the art of dallying.
    Type: Grant
    Filed: March 15, 1996
    Date of Patent: October 27, 1998
    Inventors: Howard K. Harrell, Wayne A. Payne, Charles B. Mitchell, III
  • Patent number: 5430443
    Abstract: A switch matrix circuit is described that facilitates unambiguous detection of all two key selections in a scanned matrix of switches without requiring diode based isolation of the switches, software based interpretation or timing delays. The switch matrix circuit is applicable to keypads and the like and includes a matrix of switches arranged in a plurality of electrically connected rows and columns. Each row has a driver that is capable of selectively outputting a high impedance state and an active state. Each row also has a row sense amplifier for detecting the state of its associated row. Similarly, each column has a column sense amplifier for detecting the state of its associated column.
    Type: Grant
    Filed: April 12, 1993
    Date of Patent: July 4, 1995
    Assignee: National Semiconductor Corporation
    Inventor: Charles B. Mitchell
  • Patent number: 4686725
    Abstract: A mattress supplement comprised of resilient material is substantially covered with support projections except for at least one marginal edge thereof. The marginal edge is adapted to compressively receive a sheet fitted thereto. The compression of the marginal edge permits the sheet to be secured to a mattress on which the mattress supplement is placed, instead of being pushed off thereof by the support projections.
    Type: Grant
    Filed: October 28, 1985
    Date of Patent: August 18, 1987
    Assignee: Span America Medical Systems
    Inventor: Charles B. Mitchell
  • Patent number: 4631057
    Abstract: An apparatus for injecting a substance into a human or animal comprising a body, a needle coupled to the body and terminating in a point and a needle guard mounted on the body for movement from a retracted position in which the guard does not shield the needle to an extended position in which the guard shields the needle. The needle guard can be releasably retained in the retracted position and locked in the extended position. Locking of the needle guard is accomplished by interlocking members carried by the needle guard and by a collar mounted on the body.
    Type: Grant
    Filed: December 17, 1985
    Date of Patent: December 23, 1986
    Assignees: Dolores A. Smith, Norma A. Sampson, Earl W. Sampson
    Inventor: Charles B. Mitchell
  • Patent number: D336400
    Type: Grant
    Filed: January 23, 1992
    Date of Patent: June 15, 1993
    Assignee: Span-America Medical Systems, Inc.
    Inventors: Charles B. Mitchell, Robert E. Ackley