Patent Assignment
Reel/Frame 042135/0159
Assignment of Assignor's Interest
Recorded: 2017-04-25
Pages: 5
Assignor
SPERLING, MICHAEL
Executed: 2016-09-23
Assignee
STROZ FRIEDBERG, LLC
32 AVENUE OF THE AMERICAS, 4TH FLOOR, NEW YORK, NEW YORK, 10013
Covered Property
(1)
System and Method for Query Expansion Using Knowledge Base and Statistical Methods in Electronic Search
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Security Interest
Jan 30, 2026
From: TRUSTWAVE HOLDINGS, INC.; STROZ FRIEDBERG INC.; STROZ FRIEDBERG, LLC
To: ANKURA TRUST COMPANY, LLC
Reel/Frame 073649/0743 →
Security Interest
Feb 18, 2026
From: TRUSTWAVE HOLDINGS, INC.; STROZ FRIEDBERG INC.; STROZ FRIEDBERG, LLC
To: AT&T ENTERPRISES, LLC
Reel/Frame 073824/0146 →
Release of Security Interest Recorded at Reel/Frame 73649/0743
Apr 30, 2026
From: ANKURA TRUST COMPANY, LLC
To: TRUSTWAVE HOLDINGS, INC.; STROZ FRIEDBERG INC.; STROZ FRIEDBERG, LLC
Reel/Frame 075371/0363 →