Patent Assignment
Reel/Frame 005972/0057
Assignment of Assignors Interest.
Recorded: 1991-12-23
Pages: 4
Assignee
AMERICAN TELEPHONE AND TELEGRAPH COMPANY A CORPORATION OF NEW YORK
550 MADISON AVENUE, NEW YORK, NY 10022-3201, NEW YORK
Covered Property
(1)
Information System with Knowledge Base and Data Base
Patent:
5,418,943 →
Application:
07/781,464 →
Related Assignments
(2)
Other recorded transfers of the patent in this record — the chain of ownership.