IP Library › Granted Patent US 5,011,075
Granted Patent Utility
US 5,011,075 · App. 07/468,244

Variable flow valve

Inventor: Robert L. Vandiver
Patented Case View Patent ↗
Granted: Apr 30, 1991 Filed: Jan 22, 1990
Inventor
Robert L. Vandiver

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 5,011,075
App. No.
07/468,244
Filed
1990-01-22
Granted
1991-04-30
Kind
A