IP Library › Granted Patent US 4,286,864
Granted Patent Utility
US 4,286,864 · App. 06/117,205

Photoplastic film recording and monitoring apparatus

Inventors: Gordon Lysle, Kenneth R. Baur
Patented Case View Patent ↗
Granted: Sep 1, 1981 Filed: Jan 31, 1980
Inventors
Gordon Lysle
Kenneth R. Baur
Assignee (at issue)
Bell and Howell, 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 4,286,864
App. No.
06/117,205
Filed
1980-01-31
Granted
1981-09-01
Kind
A