Granted Patent
Utility
US 4,635,899 · App. 06/715,847
Air inlet valve subassembly with replaceable seal
Inventor:
Roger D. Eshleman
Patented Case
View Patent ↗
Granted: Jan 13, 1987
Filed: Mar 25, 1985
Inventor
Roger D. Eshleman
Assignee (at issue)
Eshland Enterprises, 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.