IP Library › Granted Patent US 4,354,518
Granted Patent Utility
US 4,354,518 · App. 06/184,871

Diaphragm piston operated valve device

Inventors: Yoichi Kuroda, Hideo Tamamori
Patented Case View Patent ↗
Granted: Oct 19, 1982 Filed: Sep 8, 1980
Inventors
Yoichi Kuroda
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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,354,518
App. No.
06/184,871
Filed
1980-09-08
Granted
1982-10-19
Kind
A