Granted Patent
Utility
US 5,907,992 · App. 08/870,943
Abrasion resistant diaphragm
Inventor:
Howard D. Huss
Patented Case
View Patent ↗
Granted: Jun 1, 1999
Filed: Jun 6, 1997
Inventor
Howard D. Huss
Assignee (at issue)
Westinghouse Air Brake Co.
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.