IP Library › Granted Patent US 4,090,615
Granted Patent Utility
US 4,090,615 · App. 05/723,853

Coupler knuckle assembly

Inventor: Albert E. Martin
Patented Case View Patent ↗
Granted: May 23, 1978 Filed: Sep 17, 1976
Inventor
Albert E. Martin
Assignee (at issue)
Dresser Industries, Inc.

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 4,090,615
App. No.
05/723,853
Filed
1976-09-17
Granted
1978-05-23
Kind
A