Granted Patent
Utility
US 4,331,339 · App. 06/273,878
Seal assembly having a plastic annular sealing member with an integral sealing lip
Inventor:
Harold L. Reinsma
Patented Case
View Patent ↗
Granted: May 25, 1982
Filed: Nov 21, 1980
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.