IP Library › Granted Patent US 4,956,643
Granted Patent Utility
US 4,956,643 · App. 07/346,105

Transponder with selective antenna beam using shared antenna feed elements

Inventors: Carl J. Hahn, III, Arnold L. Berman
Patented Case View Patent ↗
Granted: Sep 11, 1990 Filed: May 2, 1989
Inventors
Carl J. Hahn, III
Arnold L. Berman
Assignee (at issue)
HAC

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 4,956,643
App. No.
07/346,105
Filed
1989-05-02
Granted
1990-09-11
Kind
A