IP Library › Granted Patent US 4,753,263
Granted Patent Utility
US 4,753,263 · App. 07/091,388

Electrohydraulic regulating valves

Inventor: Frank G. Warrick
Patented Case View Patent ↗
Granted: Jun 28, 1988 Filed: Aug 31, 1987
Inventor
Frank G. Warrick
Assignee (at issue)
Sealed Power Corporation

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 4,753,263
App. No.
07/091,388
Filed
1987-08-31
Granted
1988-06-28
Kind
A