IP Library › Granted Patent US 4,870,384
Granted Patent Utility
US 4,870,384 · App. 07/287,091

Frequency or phase modulation

Inventor: Neil E. Thomas
Patented Case View Patent ↗
Granted: Sep 26, 1989 Filed: Dec 21, 1988
Inventor
Neil E. Thomas
Assignee (at issue)
Marconi Instruments 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 4,870,384
App. No.
07/287,091
Filed
1988-12-21
Granted
1989-09-26
Kind
A