IP Library › Granted Patent US 4,945,560
Granted Patent Utility
US 4,945,560 · App. 07/406,850

Telephone network interface apparatus

Inventors: Thomas J. Collins, Peter Quintana
Patented Case View Patent ↗
Granted: Jul 31, 1990 Filed: Sep 13, 1989
Inventors
Thomas J. Collins
Peter Quintana
Assignee (at issue)
Keptel, 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 4,945,560
App. No.
07/406,850
Filed
1989-09-13
Granted
1990-07-31
Kind
A