IP Library › Granted Patent US 4,776,669
Granted Patent Utility
US 4,776,669 · App. 06/937,599

Optical path sensor including a filter

Inventors: Hans Dammann, Reiner U. Orlowski
Patented Case View Patent ↗
Granted: Oct 11, 1988 Filed: Dec 3, 1986
Inventors
Hans Dammann
Reiner U. Orlowski
Assignee (at issue)
U.S. Philips Corporation

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 4,776,669
App. No.
06/937,599
Filed
1986-12-03
Granted
1988-10-11
Kind
A