IP Library › Granted Patent US 4,534,649
Granted Patent Utility
US 4,534,649 · App. 06/436,336

Surface profile interferometer

Inventor: Michael J. Downs
Patented Case View Patent ↗
Granted: Aug 13, 1985 Filed: Oct 22, 1982
Inventor
Michael J. Downs

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 4,534,649
App. No.
06/436,336
Filed
1982-10-22
Granted
1985-08-13
Kind
A