Granted Patent
Utility
US 4,418,512 · App. 06/247,253
Machine and method for making substantially air-free sealed pouches
Inventor:
Kenneth R. Johnson
Patented Case
View Patent ↗
Granted: Dec 6, 1983
Filed: Mar 25, 1981
Inventor
Kenneth R. Johnson
Assignee (at issue)
Rexham Holdings Limited
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.