IP Library › Granted Patent US 4,428,255
Granted Patent Utility
US 4,428,255 · App. 06/277,750

Lock pin assembly

Inventor: Robert L. Fischer
Patented Case View Patent ↗
Granted: Jan 31, 1984 Filed: Mar 16, 1981
Inventor
Robert L. Fischer
Assignee (at issue)
Caterpillar Tractor Co.

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 4,428,255
App. No.
06/277,750
Filed
1981-03-16
Granted
1984-01-31
Kind
A