Granted Patent
Utility
US 4,957,193 · App. 07/393,166
Actuating cylinder having mechanical advantage
Inventor:
Hideo Tamamori
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Aug 14, 1989
Inventor
Hideo Tamamori
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.