Patents by Inventor Melvin C. Coffman

Melvin C. Coffman 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: 4149811
    Abstract: A style handle for writing and engraving instruments. The base portion of this style, which is gripped when in use, consists of three, essentially-flat surfaces arranged in a triadic spiral at a selected pitch conforming with an individual's finger grip when the style is held in a normal manner. So held, the edges of the spiral lie in the grooved portions between the individual's thumb and fingers with the thumb and fingers resting upon the flats of the spiral in a relaxed, natural manner. Also, the inclination of the spiral forms an abutment which permits the style to be held with less pressure when pressing it against a writing or working surface.
    Type: Grant
    Filed: October 3, 1975
    Date of Patent: April 17, 1979
    Inventor: Melvin C. Coffman
  • Patent number: D252815
    Type: Grant
    Filed: August 27, 1976
    Date of Patent: September 4, 1979
    Inventor: Melvin C. Coffman
  • Patent number: D261901
    Type: Grant
    Filed: September 29, 1978
    Date of Patent: November 17, 1981
    Inventor: Melvin C. Coffman