legal, united-states, trademarkI’m looking to file a trademark in the US for my mobile/web app (It’s an app for construction professionals, such as plumbers, electricians, dry wall installers, etc).
What class should I use in this case?
Downloadable mobile apps are in international class 9. That’s all you need if it’s a fully offline app. If there’s a service component to it, like if it talks to your servers, then you will probably want to also register in one of the services classes (35-45). Which one will depend on what your service does. You can browse them all here: http://www.wipo.int/classifications/nice/en/index.html
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