Patents by Inventor Mark L. Tange

Mark L. Tange 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: 5903994
    Abstract: A firearm, namely an automatic pistol such as a Model 1911, 1911 Al or the like structured to include a first portion of an elongate spring rod mounted in a space in a grip panel, and a second portion of the spring rod positioned within a notch in a thumb safety lever adjacent the grip panel. The spring rod is positioned to continuously bias the safety lever into the on-safe position wherein components of the pistol such as the hammer and trigger are locked to prevent discharge of the pistol. The safety is normally-on so that the pistol cannot be discharged absent the shooter intentionally and continuously depressing the safety lever into the off-safe position in order to discharge the pistol. The safety lever is continually biased by the spring into the safety-on position, thereby the shooter must continue to depress the thumb safety lever, overriding the spring, in order to discharge the pistol.
    Type: Grant
    Filed: November 18, 1997
    Date of Patent: May 18, 1999
    Inventor: Mark L. Tange
  • Patent number: 4995614
    Abstract: A lightweight, manually portable apparatus includes an adjustable, horizontally disposed base having a vertically rising, and partially transparent ball storage housing affixed thereto. The storage housing is internally baffled to store a number of balls in a zigzagging, vertically rising single column. A pivotally attached ball selector is positioned adjacent a ball dispensing aperture of the storage housing. The selector will allow the separation of one ball at a time from the single column of stored balls. After selection, the selected ball rolls downhill and leaves the storage housing to come to rest against a first end of an elongated pivotally attached vertical delivery chute. The delivery chute pivots downward under the weight of the ball resting thereon. The ball rolls downhill toward a second end of the chute and drops through an aperture in the delivery chute to be deposited onto a playing surface.
    Type: Grant
    Filed: August 13, 1990
    Date of Patent: February 26, 1991
    Inventor: Mark L. Tange
  • Patent number: D348497
    Type: Grant
    Filed: June 17, 1992
    Date of Patent: July 5, 1994
    Inventor: Mark L. Tange
  • Patent number: D365219
    Type: Grant
    Filed: November 15, 1994
    Date of Patent: December 19, 1995
    Inventor: Mark L. Tange
  • Patent number: D365230
    Type: Grant
    Filed: November 15, 1994
    Date of Patent: December 19, 1995
    Inventor: Mark L. Tange