Granted Patent
Utility
US 4,407,121 · App. 06/258,827
Master cylinder
Inventor:
Donald A. Crumb
Patented Case
View Patent ↗
Granted: Oct 4, 1983
Filed: Apr 29, 1981
Inventor
Donald A. Crumb
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.