Patent Assignment
Reel/Frame 006921/0681
Assignment of Assignor's Interest
Recorded: 1994-03-04
Pages: 3
Assignor
RAZDOW, ALLEN MICHAEL
Executed: 1994-03-04
Assignee
MATHSOFT, INC.
101 MAIN STREET, CAMBRIDGE, MASSACHUSETTS, 02142
Covered Property
(1)
Mathematical Document Editor and Method Performing Live Symbolic Calculations for Use with an Electronic Book
Patent:
5,469,538 →
Application:
08/206,307 →
Related Assignments
(10)
Other recorded transfers of the patent in this record — the chain of ownership.
Security Interest
Jun 3, 1996
From: MATHSOFT, INC.
To: FLEET BANK OF MASSACHUSETTS, N.A.
Reel/Frame 007986/0433 →
Release of Security Interest
Feb 23, 2001
From: FLEET BANK OF MASSACHUSETTS, N.A.
To: MATHSOFT, INC.
Reel/Frame 011551/0007 →
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 →