Patents by Inventor Gerrit Jan Groothuis

Gerrit Jan Groothuis 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).

  • Dry-shaving apparatus with reciprocatable cutting block
    Patent number: 4003131
    Abstract: A dry-shaving apparatus with a thin elastic arcuated shear plate and a reciprocatable cutter, a drive pin of an electric motor fits in a coupling slot of the cutter with a resilient means urging said pin into firm engagement with said slot.
    Type: Grant
    Filed: April 2, 1975
    Date of Patent: January 18, 1977
    Assignee: U.S. Philips Corporation
    Inventor: Gerrit Jan Groothuis