IP Library Granted Patent US 4,231,173
Granted Patent Utility
US 4,231,173 · App. 05/966,517

Excavating tooth

Inventor: Kerwin L. Davis
Patented Case View Patent ↗
Granted: Nov 4, 1980 Filed: Dec 4, 1978
Inventor
Kerwin L. Davis
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.

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Quick Facts
Patent No.
US 4,231,173
App. No.
05/966,517
Filed
1978-12-04
Granted
1980-11-04
Kind
A