ARDUINO®, and other Arduino brands and logos published in the website are Trademarks of Arduino AG. To the extent a brand, name or logo does not appear on the website does not constitute a waiver of any and all intellectual property rights that Arduino AG has established in any of its product or service names or logos. All Arduino AG Trademarks cannot be used without owner’s formal permission. For information and more details about the proper use of our trademarks, please write to firstname.lastname@example.org or email@example.com .
If you have a group, a blog or just an Arduino enthusiast you can use the Arduino Community Logo.
Officially approved boards are sold only by authorised distributors, you can see a list of them here http://arduino.cc/en/Main/Buy
Please note that Arduino doesn't sell directly on Ebay or Amazon so you should always check that what you're buying is authentic.
If a seller is not listed on our site, chances are that they boards they sell are not original.
For any questions regarding trademarks please write to trademark(at)arduino.cc
It is possible to sell boards derived from the Arduino design as long as these rules are followed
ie. If you sell a sensor that is compatible with Arduino you can call it "XYZ sensor for Arduino" and NOT "Arduino XYZ Sensor"