IP Library › Granted Patent US 4,187,626
Granted Patent Utility
US 4,187,626 · App. 05/881,724

Excavating tool having hard-facing elements

Inventors: Donald J. Greer, John D. MacEwan, Jr.
Patented Case View Patent ↗
Granted: Feb 12, 1980 Filed: Feb 27, 1978
Inventors
Donald J. Greer
John D. MacEwan, Jr.
Assignee (at issue)
ESCO GROUP LLC

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 4,187,626
App. No.
05/881,724
Filed
1978-02-27
Granted
1980-02-12
Kind
A