Patents by Inventor John E. Shenken

John E. Shenken 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).

  • Patent number: D278558
    Type: Grant
    Filed: August 12, 1982
    Date of Patent: April 23, 1985
    Inventors: John E. Shenken, Charles A. Haas
  • Patent number: D390147
    Type: Grant
    Filed: September 16, 1996
    Date of Patent: February 3, 1998
    Assignee: Cobbs Manufacturing Company
    Inventors: Jerome J. Hartmann, Thomas R. Steinhagen, Charles A. Haas, John E. Shenken