Granted Patent
Utility
US 4,239,292 · App. 06/021,741
Brake gear for vehicles
Inventor:
Minoru Nagase
Patented Case
View Patent ↗
Granted: Dec 16, 1980
Filed: Mar 19, 1979
Inventor
Minoru Nagase
Assignee (at issue)
Nippon Air Brake Co., Ltd.
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.