Trade names and trademarks
The use of trade names and/or trademarks that are asserted and/or registered by their owners for designating particular products or services should be avoided in ETSI deliverables. Instead a corresponding standard should be used or a correct designation or a generic description should be given (see example).
EXAMPLE 1: Instead of "ZigBee®" refer to IEEE 802.15.4TM.
If, in exceptional circumstances, the use of trade names/trademarks cannot be avoided, their nature shall be indicated by the symbols TM for any trademark or ® for a registered trademark. The use of this sign is trickier than ™ since it can only be used when a trademark is registered. If badly used it can be considered (legally) as an offence.
It is therefore recommended in a first stage to refer to the organisation's trademark policy webpage. In most cases you will find all the information you need on how insert the trademark in your deliverable (details on whether you add ® or ™ either the first time the trademark is mentioned or every time it is mentioned). Depending on the policy you may also be asked to insert an attribution notice. The attribution notice should be mentioned in a NOTE, either the first time the trademark appears in the ETSI deliverable or every time the trademark appears in the deliverable (again depending on the owner’s policy).
EXAMPLE 2:
NOTE: The OpenStack® Word Mark and OpenStack Logo are either registered trademarks/service marks or trademarks/service marks of the OpenStack Foundation, in the United States and other countries and are used with the OpenStack Foundation's permission. ETSI is not affiliated with, endorsed or sponsored by the OpenStack Foundation, or the OpenStack community.
If you have remaining doubts you may also want to refer to one of the following databases (to check for example if legal protection is still valid):