IP Library › Granted Patent US 4,897,542
Granted Patent Utility
US 4,897,542 · App. 07/174,734

Optical pressure sensor

Inventors: John P. Dakin, Philip B. Withers
Patented Case View Patent ↗
Granted: Jan 30, 1990 Filed: Mar 29, 1988
Inventors
John P. Dakin
Philip B. Withers
Assignee (at issue)
Plessey Overseas 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 4,897,542
App. No.
07/174,734
Filed
1988-03-29
Granted
1990-01-30
Kind
A