IP Library › Granted Patent US 4,904,185
Granted Patent Utility
US 4,904,185 · App. 07/267,032

Dental instrument

Inventor: John T. McSpadden
Patented Case View Patent ↗
Granted: Feb 27, 1990 Filed: Jan 10, 1948
Inventor
John T. McSpadden

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 4,904,185
App. No.
07/267,032
Filed
1948-01-10
Granted
1990-02-27
Kind
A