Granted Patent
Utility
US 4,275,890 · App. 06/098,147
Seal with stiffened force-transmitting portion
Inventor:
Harold L. Reinsma
Patented Case
View Patent ↗
Granted: Jun 30, 1981
Filed: Jul 16, 1979
Inventor
Harold L. Reinsma
Assignee (at issue)
Caterpillar Tractor Co.
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.