IP Library › Granted Patent US 4,643,519
Granted Patent Utility
US 4,643,519 · App. 06/873,872

Wavelength division optical multiplexer/demultiplexer

Inventors: Anne B. Bussard, Robert E. Pulfrey
Patented Case View Patent ↗
Granted: Feb 17, 1987 Filed: Jun 12, 1986
Inventors
Anne B. Bussard
Robert E. Pulfrey
Assignee (at issue)
International Telephone and Telegraph 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 4,643,519
App. No.
06/873,872
Filed
1986-06-12
Granted
1987-02-17
Kind
A