Patents by Inventor Marvin Christman

Marvin Christman 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: 4703712
    Abstract: A manual selector includes a frame fixedly seated on a base forming oppositely opening internal grooves. A slide is slideable lengthwise in the grooves between discrete selective positions. A position identifying colored surface of the base is visible through a slot in the top of the frame for distinguishing between the selector positions. The slide includes a plurality of feet at opposite sides of the slide. The feet contact the colored base surface only at the opposite margins of the surface. A slide-locating assembly includes an interengageable member carried by the slide and a plurality of cooperating interengageable members carried by the frame. The engagement of the slide interengageable member with one of the frame interengageable members defines one of plurality of selective positions.
    Type: Grant
    Filed: August 22, 1986
    Date of Patent: November 3, 1987
    Inventor: Marvin Christman