Granted Patent
Utility
US 4,058,345 · App. 05/660,492
Brake apparatus including control valve with integral check valve
Inventor:
Boleslaw M. Klimek
Patented Case
View Patent ↗
Granted: Nov 15, 1977
Filed: Feb 23, 1976
Inventor
Boleslaw M. Klimek
Assignee (at issue)
Echlin Manufacturing Company
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.