Patents by Inventor William Koelbel

William Koelbel 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).

  • End standard for a lounge seat
    Patent number: D259607
    Type: Grant
    Filed: May 21, 1979
    Date of Patent: June 23, 1981
    Inventors: Otto Stahl, Jr., William Koelbel
  • End standard for a bench
    Patent number: D266133
    Type: Grant
    Filed: October 25, 1979
    Date of Patent: September 14, 1982
    Inventors: Otto Stahl, Jr., William Koelbel