Granted Patent
Utility
US 5,217,549 · App. 07/680,714
Pneumatic safety tire
Inventor:
David A. Johnson
Patented Case
View Patent ↗
Granted: Jun 8, 1993
Filed: Apr 4, 1991
Inventor
David A. Johnson
Assignee (at issue)
Bridgestone Firestone
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.