DIGIA QT TRADE MARK USAGE GUIDELINES
Digia PLC and/or its subsidiaries ("Digia") is the owner of Qt trade marks worldwide. The Qt trade marks are valuable assets which Digia wishes to protect. Trade marks are used to provide assurance to the public of the quality of the products and services with which the trade mark is associated. As such, they must be used properly and consistently otherwise the trade marks risk becoming generic, making them impossible to enforce. The following guidelines govern use of the Qt trade marks, whether by Digia or third parties, in order to protect the value of the Qt trade marks and provide guidance to Qt users on how they should and should not use the Qt trade marks. Unauthorised use of the Qt trade marks, or confusingly similar marks, which does not comply with these guidelines is prohibited and may constitute trade mark infringement. These guidelines do not interfere with your right to use or modify the underlying Qt open source software as permitted under applicable open source license.
1. FAIR USE:
In certain circumstances, when marks are used for the purpose of description or identification, use of the mark constitutes "fair use" as it does not suggest sponsorship or endorsement by the trade mark owner and therefore is not being used in a manner to confuse the user. Such use is permitted, would not constitute trade mark infringement and does not therefore require a trade mark license. The purpose of this section of the guidelines is to set out what constitutes "fair use" of the Qt marks. However, if in doubt as to whether your proposed use of the Qt marks would constitute "fair use", please contact Qt Project/Legal Contact/Ruotsalainen Topi.
Use of the Qt word mark to make factual statements about Qt software products or the Qt Project, or to truthfully state that your products or services are created using Qt software, designed for use with Qt products or compatible with Qt products would constitute "fair use", for example:
- 1.1 To specifically refer to Qt products, e.g. Qt software is an application service framework software.
- 1.2 To refer to an application created with Qt software where the Qt name is not being used in a way which suggests sponsorship or endorsement of the product, e.g. XYZ application includes dependencies to Qt version 4.7.2, or XYZ application created using Qt version 4.7.2.
- 1.3 To refer to new Qt ports e.g. Qt for Windows®, Qt for Mac OSX®, Qt for Embedded Linux®, Qt for Android® etc.
- 1.4 To refer to tools created for use with Qt e.g. ABC Tool for Qt. If the tool is only capable of being used with a specific version of Qt, then the version number should be stated, e.g. ABC Tool for Qt versions 4.8.0 or later.
- 1.5 In articles about the Qt software or Qt Project or other Qt products.
Any other uses of the Qt word mark require Digia’s approval and may require a license from Digia.
All uses of the Qt Logo require a trademark license. Additionally, Qt users who desire a license to the Qt trademarks should execute a trademark license agreement with Digia. Please download the trademark license (PDF), insert the relevant details, sign the agreement and submit it to Digia by emailing a scanned copy to Qt Project/Legal Contact/ Ruotsalainen Topi.
We are working on implementing the trademark licenses as a "click to accept" agreement and hope to have this functionality implemented shortly.
2. PROHIBITED USE:
Without limitation, the following uses of the Qt trade marks are not permitted:
- 2.1 Use of the Qt logo or Qt slogan without an express written license.
- 2.2 Use of the Qt trade marks in a manner that is false, misleading or would disparage, denigrate or otherwise be detrimental to the Qt trade marks, the reputation of the Qt Project, Digia or its products or services, e.g. through false or misleading advertising.
- 2.3 Use of the Qt trade mark in conjunction with your company name or another name without express written permission.
- 2.4 Use of the Qt trade marks as the whole or part of your domain names.
- 2.5 Use of the Qt trade marks as meta tags.
- 2.6 Use of the Qt trade marks as part of your company name or logo.
- 2.7 Use of the Qt trade marks in a manner that suggests endorsement or sponsorship of your products or services, e.g. by more prominent use of the Qt trade marks than your own marks or company name.
- 2.8 Use of the Qt trade marks on the cover of a book or publication without an express written license.
- 2.9 Use of the Qt trade marks on promotional or marketing materials such as posters, brochures, signs, websites to promote your events, products or services without express written permission.
- 2.10 Alterations of the Qt trade marks in any way.
- 2.11 Attempts to assert any ownership rights in the Qt trade marks, including but not limited to attempts to register Qt trade marks or confusingly similar as trade marks, company names, domain names anywhere in the world.
3. GUIDELINES FOR USE OF THE QT TRADE MARKS:
Use of the Qt trade marks, either under the "Fair Use" provisions described above or under the trademark license agreement, must comply with our brand guidelines.
The following rules are applied to all usage of Qt trade marks, whether within the "fair use" guidelines as set out above or under a license:
No Possessives: Since a trade mark is not a noun, it must never be used in possessive form, e.g. one should not refer to "Qt’s software" but rather to "Qt® software".
No Plurals: Since a trademark is not a noun, it must never be used in plural form.
No Verbs: Since a trademark is not a verb, it must never be used as a verb.
Distinguish the Qt trade mark: from surrounding words by capitalizing the first letter, underlining, italicizing, placing in bold or different font, and/or placing in quotes.
Never use the Qt trade mark with both letters capitalized, in the form "QT".
Proper Trademark Attribution: Users of the Qt word mark must include an attribution that Qt is a registered mark e.g. by using ® after the Qt trade mark in subscript or superscript, and with a trademark legend denoting that Qt is a registered trade mark of Digia Plc and/or its subsidiaries.
The ® symbol is required upon the first use of the mark in any text, even though the symbol may have already been used in the headline or other prominent use. It is not necessary to repeat the designation throughout the rest of the document. However, the symbol should be used on first occurrence within sidebars, charts, tables, graphs, and slides, since these elements have greater potential to be read or placed independently.
The trade mark legend need not be prominently displayed or included on physical product packaging, and may be included in the product documentation or at the bottom of a web page. The legend must be presented in text size and font large enough to be legible.
The following is an example of the legend to be used in all material referencing the Qt trade mark:
"Qt is a registered trade mark of Digia Plc and/or its subsidiaries." If the material referencing the Qt trade mark also refers to a number of other third party trade marks, a general ownership statement e.g. "all other trade marks are the property of their respective owners" is acceptable.
4. NO WARRANTIES:
Nothing herein shall be construed as a representation, warranty or promise by Digia that the use of the Qt trade marks will not infringe the intellectual property rights of any third party.
If you have any questions regarding these guidelines, wish to report any misuse of the Qt trade marks, are unsure whether you require a trade mark license or wish to obtain a license to use the Qt trade marks, please contact Qt Project/Legal Contact/Ruotsalainen Topi.
Digia reserves the right to update or amend these guidelines at its discretion at any time with 30 days' written notice by posting the updated or amended terms on the Qt Project web site.