Granted Patent
Utility
US 6,591,781 · App. 09/929,762
Squirrel proof bird feeder
Inventor:
Stewart Hardison
Patented Case
View Patent ↗
Granted: Jul 15, 2003
Filed: Aug 14, 2001
Inventor
Stewart Hardison
Assignee (at issue)
PERKY-PET PRODUCTS COMPANY, INC.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.