Granted Patent
Utility
US 4,247,080 · App. 05/972,149
Seal assembly for valves
Inventor:
Bertram L. Morrison
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: Dec 21, 1978
Inventor
Bertram L. Morrison
Assignee (at issue)
ACF Industries Incorporated
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.