Granted Patent
Utility
US 4,364,231 · App. 06/142,944
Compound master brake cylinder
Inventors:
Robert M. Dwyer, Edwin J. Skiba
Patented Case
View Patent ↗
Granted: Dec 21, 1982
Filed: Apr 23, 1980
Inventors
Robert M. Dwyer
Edwin J. Skiba
Assignee (at issue)
Massey Ferguson Group 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.