IP Library › Granted Patent US 4,690,256
Granted Patent Utility
US 4,690,256 · App. 06/771,373

Torsion damping assembly

Inventors: Warren G. Bopp, David A. Janson
Patented Case View Patent ↗
Granted: Sep 1, 1987 Filed: Aug 30, 1985
Inventors
Warren G. Bopp
David A. Janson
Assignee (at issue)
Eaton 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 4,690,256
App. No.
06/771,373
Filed
1985-08-30
Granted
1987-09-01
Kind
A