Granted Patent
Utility
US 5,155,969 · App. 07/703,274
Heat seal vacuum system
Inventor:
David F. Kuethe
Patented Case
View Patent ↗
Granted: Oct 20, 1992
Filed: May 20, 1991
Inventor
David F. Kuethe
Assignee (at issue)
Oscar Mayer Foods 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.