IP Library › Granted Patent US 5,938,170
Granted Patent Utility
US 5,938,170 · App. 08/827,964

Proportional control solenoid relief valve

Inventors: Yoshiyuki Shimada, Tetsuya Yoshino
Patented Case View Patent ↗
Granted: Aug 17, 1999 Filed: Apr 7, 1997
Inventors
Yoshiyuki Shimada
Tetsuya Yoshino
Assignee (at issue)
Shin Caterpiller Mitsubishi 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 5,938,170
App. No.
08/827,964
Filed
1997-04-07
Granted
1999-08-17
Kind
A