Granted Patent
Utility
US 5,297,576 · App. 07/962,386
Oral inflation and relief tube
Inventor:
Jacek M. Weinheimer
Patented Case
View Patent ↗
Granted: Mar 29, 1994
Filed: Oct 16, 1992
Inventor
Jacek M. Weinheimer
Assignee (at issue)
Halkey-Roberts Corporation
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.