Granted Patent
Utility
US 4,954,194 · App. 07/197,376
Method for making an airspring and sleeve
Inventor:
Michael L. Crabtree
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: May 23, 1988
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.