Patent Assignment
Reel/Frame 008349/0173
Assignment of Assignor's Interest
Recorded: 1996-12-16
Pages: 3
Assignor
LAM, CHI K.
Executed: 1996-12-09
Assignee
AT&T CORPORATION
32 AVENUE OF THE AMERICAS, NEW YORK, NEW YORK, 10013
Covered Property
(1)
Dual-Tone Multi-Frequency Signal Transfer Protocol
Patent:
5,835,574 →
Application:
08/766,097 →
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Jul 25, 2008
From: AT&T CORP.
To: TTA WIRELESS TRANSFER CO., LLC
Reel/Frame 021291/0508 →
Assignment of Assignor's Interest
Jan 5, 2020
From: INTELLECTUAL VENTURES ASSETS 161 LLC
To: HANGER SOLUTIONS, LLC
Reel/Frame 052159/0509 →
Assignment of Assignor's Interest
Feb 15, 2020
From: F. POSZAT HU, L.L.C.
To: INTELLECTUAL VENTURES ASSETS 161 LLC
Reel/Frame 051944/0432 →