Patents by Inventor Hendrik J. Vernhout

Hendrik J. Vernhout 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).

  • Acid engraving machine device
    Patent number: 3935052
    Abstract: An acid engraving device containing a reservoir for acid, a valve to meter the acid flow from the reservoir, and a ball point etching pen to apply acid to the work surface.
    Type: Grant
    Filed: July 31, 1974
    Date of Patent: January 27, 1976
    Assignee: The Raymond Lee Organization, Inc.
    Inventor: Hendrik J. Vernhout