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	title of this thread your message Copyright on music literature, pictures, art etc. etc. is the longest protection and is based on a number of years after the year in which the artist / composer/ etc. died. In many countries it is 50 years but there are small differences. On products there is no copyright possible! If it is an invention, it is patented and most patents last 20 years. If it is simply a model...say the Barcelona chair, it can only be protected under a designpatent and there again if renewed on a regular basis it can last more or less two decades depending on the country of origin. As mentioned before this is not the basis of the Knoll versus Alphaville case because non of the three different legislations on protection of intellectual property (other than trademark)would apply. 1-It can not be copyrighted 2-It is not patentable because it is not an invention 3-A designpatent, if their ever was one, would have expired. This is simply a case of a trade dress claim under the trademark law. There is a lot of literature on the subject but to get some insight: associated web images (optional) associated web link (optional) your email your password create a forums account \| you forgot your password?