Patents by Inventor Serge Grasnianski

Serge Grasnianski 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).

  • Flat key
    Patent number: 3950973
    Abstract: A flat key comprises a blank cut on a copying machine to form a shank, having a shank head. An intermediate head is formed with a slot, in which the shank head is received. A key head is detachably connected with the intermediate head, with wedge action between these latter heads.
    Type: Grant
    Filed: February 3, 1975
    Date of Patent: April 20, 1976
    Assignee: Kis France
    Inventor: Serge Grasnianski