Well, this is not a very difficult question. Obviously, you do not need a trademark if you do not have a business. In this case, it seems very unlikely that you will ever require a trademark. However, if you have your own business, do you need to register your trademark?
What Amazon requires to accept your brand? In some cases you have everything in place: you registered your trademark, you have a website, you printed the name of your trademark on the packaging and products. What can go wrong?
A trademark is valid for a limited period of time — it varies from 7 to 20 years, depending on a country. After the period, the trademark should be renewed and it can be renewed for as many times as you wish.
When a trademark becomes very popular, so popular that it is used to virtually name the product, it means that the mark is about to be genericized.
3D trademarks are a rather new type of Intellectual Property. In many countries of the world, it is still impossible to file a 3D trademark; however, even in the countries where it is possible, the 3D trademarks are often misused.
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