Granted Patent
Utility
US 6,237,538 · App. 09/158,714
Pet toy ball feeder
Inventor:
Steven Tsengas
Patented Case
View Patent ↗
Granted: May 29, 2001
Filed: Sep 22, 1998
Inventor
Steven Tsengas
Assignee (at issue)
Napro, 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.