Granted Patent
Utility
US 4,387,901 · App. 06/355,999
Retraction seal for a disc brake with anti-nibbling feature
Inventor:
Irving R. Ritsema
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: Mar 8, 1982
Inventor
Irving R. Ritsema
Assignee (at issue)
Bendix Limited
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.