IP Library Granted Patent US 4,352,285
Granted Patent Utility
US 4,352,285 · App. 06/073,022

Hydraulic wedge mandrel

Inventors: Forrest N. LaRue, Lionel H. Wheeler
Patented Case View Patent ↗
Granted: Oct 5, 1982 Filed: Sep 6, 1979
Inventors
Forrest N. LaRue
Lionel H. Wheeler
Assignee (at issue)
Crutcher Resources 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 4,352,285
App. No.
06/073,022
Filed
1979-09-06
Granted
1982-10-05
Kind
A