Patent Assignment
Reel/Frame 008155/0368
Assignment of Assignor's Interest
Recorded: 1996-06-20
Pages: 3
Assignee
MATHSOFT, INC.
101 MAIN STREET, CAMBRIDGE, MASSACHUSETTS, 02142
Covered Property
(1)
Locking Mechanism for Live Mathematical Documents
Patent:
5,844,555 →
Application:
08/667,187 →
Related Assignments
(9)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Mar 9, 2001
From: MATHSOFT, INC.
To: MATHSOFT ENGINEERING & EDUCATION, INC.
Reel/Frame 011601/0610 →
Security Agreement
Mar 16, 2001
From: MATHSOFT ENGINEERING & EDUCATION, INC. A DELAWARE CORPORATION; MATHSOFT CORPOPRATE HOLDINGS, INC.A DELAWARE CORPORATION
To: SPRING CAPITAL PARTNERS, L.P.
Reel/Frame 011627/0577 →
Security Agreement
Mar 23, 2001
From: MATHSOFT ENGINEERING & EDUCATION, INC.
To: CITIZENS BANK OF MASSACHUSETTS
Reel/Frame 011648/0253 →
Release of Intellectual Property Collateral
Jul 23, 2004
From: CITIZENS BANK OF MASSACHUSETTS
To: MATHSOFT ENGINEERING & EDUCATION, INC.; MATHSOFT CORPORATE HOLDINGS, INC.
Reel/Frame 014892/0001 →
Security Interest
Sep 1, 2004
From: MATHSOFT ENGINEERING & EDUCATION, INC.; MATHSOFT CORPORATE HOLDINGS, INC.
To: SILICON VALLEY BANK DBA SILICON VALLEY EAST
Reel/Frame 015098/0061 →
Security Agreement
Mar 18, 2005
From: MATHSOFT ENGINEERING & EDUCATION, INC.
To: PARTNERS FOR GROWTH, L.P.
Reel/Frame 015788/0782 →
Release of Intellectual Property Collateral
Mar 22, 2005
From: SPRING CAPITAL PARTNERS, L.P.
To: MATHSOFT ENGINEERING & EDUCATION, INC.; MATHSOFT CORPORATE HOLDINGS, INC.
Reel/Frame 015797/0573 →
Assignment of Assignor's Interest
Mar 16, 2009
From: MATHSOFT ENGINEERING & EDUCATION, INC.; MATHSOFT CORPORATE HOLDINGS, INC.
To: PARAMETRIC TECHNOLOGY CORPORATION
Reel/Frame 022399/0489 →
Security Interest
Nov 4, 2015
From: PTC INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 037046/0930 →