Patents by Inventor William Doornbos

William Doornbos 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).

  • Bird feeder
    Patent number: D383877
    Type: Grant
    Filed: March 18, 1996
    Date of Patent: September 16, 1997
    Inventor: William Doornbos
  • Bird feeder
    Patent number: D385066
    Type: Grant
    Filed: March 18, 1996
    Date of Patent: October 14, 1997
    Inventor: William Doornbos