Granted Patent
Utility
US 4,763,883 · App. 07/032,212
Airspring and sleeve
Inventor:
Michael L. Crabtree
Patented Case
View Patent ↗
Granted: Aug 16, 1988
Filed: Mar 30, 1987
Inventor
Michael L. Crabtree
Assignee (at issue)
The Gates 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.