IP Library › Granted Patent US 4,870,677
Granted Patent Utility
US 4,870,677 · App. 07/093,374

Data/facsimile telephone subset apparatus incorporating electrophoretic displays

Inventors: Frank J. Di Santo, Denis A. Krusos
Patented Case View Patent ↗
Granted: Sep 26, 1989 Filed: Sep 4, 1987
Inventors
Frank J. Di Santo
Denis A. Krusos
Assignee (at issue)
Copytele, Inc.

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 4,870,677
App. No.
07/093,374
Filed
1987-09-04
Granted
1989-09-26
Kind
A