Patents by Inventor Frederik Gritter

Frederik Gritter 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).

  • Dental handpieces
    Patent number: 4171571
    Abstract: A dental handpiece has a rotor with pistons in longitudinal bores, the pistons being displaced by air pressure and engaging against a swash plate to cause the rotor to rotate. The direction and speed of rotation is controlled by an air distributor member having a plate which controls the amount of and direction of the air flow.
    Type: Grant
    Filed: January 6, 1977
    Date of Patent: October 23, 1979
    Inventor: Frederik Gritter