IP Library › Granted Patent US 4,543,994
Granted Patent Utility
US 4,543,994 · App. 06/450,890

Rigid mount coupler

Inventors: Lyle R. Johnson, Eugene H. Herzan
Patented Case View Patent ↗
Granted: Oct 1, 1985 Filed: Dec 20, 1982
Inventors
Lyle R. Johnson
Eugene H. Herzan
Assignee (at issue)
Parker-Hannifin 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 4,543,994
App. No.
06/450,890
Filed
1982-12-20
Granted
1985-10-01
Kind
A