Granted Patent
Utility
US 4,778,852 · App. 07/034,365
Roofing composition
Inventor:
Shingo Futamura
Patented Case
View Patent ↗
Granted: Oct 18, 1988
Filed: Apr 6, 1987
Inventor
Shingo Futamura
Assignee (at issue)
The Firestone Tire & Rubber 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.