If it does not have a clear aesthetic appearance. If it is a method or principle of construction. If the designs features dictated solely by function. If integral parts which consist features that dependent upon the appearance of another article. If differs only in immaterial details or in features commonly used in the relevant trade. [...]
Only the owner of the industrial design may apply to register the design. The owner may authorize an agent to file an application on his behalf if he is not able to register it.
What is the difference between the protection offered by a 3D trademark and that one offered by a drawing or design?
Designs protect the novelty and the singular character of products, while the registration of a three-dimensional trademark protects the distinctive character of the sign against other existing signs are used for the same goods or services. An original form may not register as a trademark if it does not meet the condition to be distinctive [...]