Granted Patent
Utility
US 3,970,416 · App. 05/595,880
Reinforced membrane
Inventor:
William F. Mattson
Patented Case
View Patent ↗
Granted: Jul 20, 1976
Filed: Jul 14, 1975
Inventor
William F. Mattson
Assignee (at issue)
B. F. Goodrich Company
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.