Trademarks and Legal Notices

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The material contained in this document is provided "as is", and is subject to being changed, without notice, in future editions.


The program names xgeom, emstatus, emvu, patvu, dxfgeo, ebridge, emgraph, gds, cvbridge, emserver, emclient, sonntcds, sonntawr, sonnetCluster, sonntads, sonntawr64, sonntgbr, viamerge,  bbextract, TrueVolume, Co-calibrated, Lite, LitePlus, Level2 Basic, Level2 Silver, and Level3 Gold are trademarks of Sonnet Software, Inc.

Sonnet®, em®, and emCluster® are registered trademarks of Sonnet Software, Inc.

UNIX® is a registered trademark of the Open Group.

Windows 7, Windows 8, Windows 10 are U.S. registered trademarks of Microsoft Corporation.

Qt® is a registered trademark of The Qt Company Ltd. and its subsidiaries.

AutoCAD and Drawing Interchange file (DXF) are trademarks of Auto Desk, Inc.

Cadence®, Virtuoso®, AWR Design Environment®, and Microwave Office® are registered trademarks of Cadence Design Systems, Inc.

ADS, Series IV, Touchstone, and Libra are trademarks of KeysightTechnologies.

HSPICE is a registered trademark of Synopsys, Inc.

GDSII is a trademark of Calma Company.

Flexera Software, Flexlm, FlexNet, InstallShield, are trademarks of Flexera Software, Inc. and/or InstallShield Co.Inc. in the United States of America and/or other countries.

Linux is a registered trademark of Linus Torvalds.

Red Hat® is a registered trademark of Red Hat, Inc.

OpenGL® is a registered trademark owned by Silicon Graphics, Inc.

MATLAB is a registered trademark of The MathWorks, Inc. in the United States and/or other countries.

Acrobat® is a registered trademark of Adobe Systems Incorporated.

ODB++® is a registered trademark of Mentor Graphics Corporation.

Modelithics® is a registered trademark of Modelithics, Inc.


Sonnet uses the GCC compiler under the following license

GNU Software (with C++ Runtime GPL Exception)


Version 3 (2007) can be found here: 

The C++ Runtime GPL Exception

As a special exception, you may use this file as part of a free software library without restriction. Specifically, if other files instantiate templates or use macros or inline functions from this file, or you compile this file and link it with other files to produce an executable, this file does not by itself cause the resulting executable to be covered by the GNU General Public License. This exception does not however invalidate any other reasons why the executable file might be covered by the GNU General Public License.

     Sonnet uses the following Third-Party items licensed under the GNU Lesser General Public License (LGPL):


Qt is available under the GNU Lesser General Public License version 3.  The Qt Toolkit is Copyright (C) 2018 The Qt Company Ltd. and other contributors.


Qwt library and included programs are under the GNU Lesser General Public License (LGPL)

Qwt Polar

QwtPolar is distributed under the terms of the Qwt License, Version 1.0. and the GNU Lesser General Public License (LGPL)


QuaZip library is licensed under the GNU Lesser General Public License (LGPL) V2.1 plus a static linking exception.

Sonnet delivers the Microsoft Visual C++ Redistributable which has the following license



These license terms are an agreement between Microsoft Corporation (or based on where you live, one of its affiliates) and you. They apply to the software named above. The terms also apply to any Microsoft services or updates for the software, except to the extent those have different terms.


(i) Warranty. The properly licensed software will perform substantially as described in any Microsoft materials that accompany the software. However, Microsoft gives no contractual guarantee in relation to the licensed software.

(ii) Limitation of Liability. In case of intentional conduct, gross negligence, claims based on the Product Liability Act, as well as, in case of death or personal or physical injury, Microsoft is liable according to the statutory law.

This limitation applies to (a) anything related to the software, services, content (including code) on third party Internet sites, or third party applications; and (b) claims for breach of contract, breach of warranty, guarantee or condition, strict liability, negligence, or other tort to the extent permitted by applicable law.

It also applies even if Microsoft knew or should have known about the possibility of the damages. The above limitation or exclusion may not apply to you because your country may not allow the exclusion or limitation of incidental, consequential or other damages.

Sonnet uses the following 3rd party items under these licenses


OpenGL Licensing Programs

Application developers do not need to license the OpenGL API. Generally, hardware vendors that are creating binaries to ship with their hardware are the only developers that need to have a license. If an application developer wants to use the OpenGL API, the developer needs to obtain copies of a linkable OpenGL library for a particular hardware device or machine. Those OpenGL libraries may be bundled with the development and/or run-time options or may be purchased from a third-party software vendor without licensing the source code or use of the OpenGL trademark.

The following are the currently available licenses:

As an added note, past Level 3 licensees could distribute modified OpenGL source code only to either level 2 or level 3 licensees. With release of the S.I. to open source, SGI has relaxed this requirement to some extent. Provided the distributor (a current level 3 licensee) is willing to sign a Retro Agreement with SGI and change the copyrights on the code to the open source copyrights (and then submit the code to SGI for inspection), the distributee does not have to be a level 2 or level 3 licensee. If the Distributor chooses not to do the preceding, then the distributee must become a level 2 Licensee.

New open source licenses of the OpenGL S.I. can freely distribute source and modified source within the liberal terms of the open source license.
Note Licenses for Windows® platforms ARE obtained directly from Microsoft. Developers should send an e-mail to with the words line 3-D Graphics DDK Licenses in the subject line.

In the past, licenses included source code (depending upon the license) and documentation. Currently, all the source code is available as open source and the documentation is available on the website. So licenses now convey rights and have no deliverables associated with them.


Brik is  Copyright  1989  Rahul Dhesi,  all rights reserved.  Permission is granted to copy, use, and distribute for any commercial or noncommercial purpose in accordance with the requirements of version 1.0 of  the GNU General Public license.

Brik source code has not been modified.


Copyright (c) 1990-1999 Info-ZIP.  All rights reserved.

For the purposes of this copyright and license, "Info-ZIP" is defined as

the following set of individuals:

   Mark Adler, John Bush, Karl Davis, Harald Denker, Jean-Michel Dubois,

   Jean-loup Gailly, Hunter Goatley, Ian Gorman, Chris Herborth, Dirk Haase,

   Greg Hartwig, Robert Heath, Jonathan Hudson, Paul Kienitz, David Kirschbaum,

   Johnny Lee, Onno van der Linden, Igor Mandrichenko, Steve P. Miller,

   Sergio Monesi, Keith Owens, George Petrov, Greg Roelofs, Kai Uwe Rommel,

   Steve Salisbury, Dave Smith, Christian Spieler, Antoine Verheijen,

   Paul von Behren, Rich Wales, Mike White

This software is provided "as is," without warranty of any kind, express

or implied.  In no event shall Info-ZIP or its contributors be held liable

for any direct, indirect, incidental, special or consequential damages

arising out of the use of or inability to use this software.

Permission is granted to anyone to use this software for any purpose,

including commercial applications, and to alter it and redistribute it

freely, subject to the following restrictions:

    1. Redistributions of source code must retain the above copyright notice,

       definition, disclaimer, and this list of conditions.

    2. Redistributions in binary form must reproduce the above copyright

       notice, definition, disclaimer, and this list of conditions in

       documentation and/or other materials provided with the distribution.

    3. Altered versions--including, but not limited to, ports to new operating

       systems, existing ports with new graphical interfaces, and dynamic,

       shared, or static library versions--must be plainly marked as such

       and must not be misrepresented as being the original source.  Such

       altered versions also must not be misrepresented as being Info-ZIP

       releases--including, but not limited to, labeling of the altered

       versions with the names "Info-ZIP" (or any variation thereof, including,

       but not limited to, different capitalizations), "Pocket UnZip," "WiZ"

       or "MacZip" without the explicit permission of Info-ZIP.  Such altered

       versions are further prohibited from misrepresentative use of the

       Zip-Bugs or Info-ZIP e-mail addresses or of the Info-ZIP URL(s).