IP Library › Granted Patent US 4,862,977
Granted Patent Utility
US 4,862,977 · App. 07/033,072

Drill bit and cutter therefor

Inventors: John D. Barr, Terry R. Matthias, Malcolm R. Taylor
Patented Case View Patent ↗
Granted: Sep 5, 1989 Filed: Mar 31, 1987
Inventors
John D. Barr
Terry R. Matthias
Malcolm R. Taylor
Assignee (at issue)
Reed Tool Company Limited

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 4,862,977
App. No.
07/033,072
Filed
1987-03-31
Granted
1989-09-05
Kind
A