IP Library › Assignment 046638/0726
Patent Assignment
Reel/Frame 046638/0726

Assignment of Assignor's Interest

Recorded: 2018-08-21 Pages: 3
Assignor
SCHULZRINNE, HENNING G.
Executed: 2018-08-17
Assignee
THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK
535 WEST 116TH ST., NEW YORK, NEW YORK, 10027
Covered Property (1)
Prevention of Denial of Service (Dos) Attacks on Session Initiation Protocol (Sip)-Based Systems Using Return Routability Check Filtering
Patent: 8,966,619 →
Application: 11/557,740 →
Publication: US 2008/0222724
Related Assignments (2)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest Apr 12, 2007
From: ORMAZABAL, GASTON
To: VERIZON SERVICES CORP.
Reel/Frame 019149/0608 →
Assignment of Assignor's Interest Nov 2, 2009
From: VERIZON SERVICES CORP.
To: VERIZON PATENT AND LICENSING INC.
Reel/Frame 023455/0611 →