Granted Patent
Utility
US 4,382,492 · App. 06/248,650
Disc brake having a piston retraction assembly
Inventor:
Irving R. Ritsema
Patented Case
View Patent ↗
Granted: May 10, 1983
Filed: Mar 27, 1981
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.