Patents by Inventor Herman Plomp

Herman Plomp 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).

  • Automatic telephone dialing unit
    Patent number: D247898
    Type: Grant
    Filed: October 8, 1976
    Date of Patent: May 16, 1978
    Assignee: Varel B.V.
    Inventors: Herman Plomp, Jan Hendrik Lucas