From the legal perspective a trademark is any sign that allowsto distinguish a good or service from the competition's offer. There are two conclusions from this. Firstly only a name or logo that is used commercially serves as a trademark. Graffiti on the wall does not meet this requirement. Secondly such a marking must allow you to stand out on the market. In this case the name "dental clinic" does not qualify because it simply informs about the type of services offered there.
As long as the above requirements are met almost anything can be protected as a trademark. In addition to signs. The appearance philippines photo editor of the Toffifee candy sound signs colors are also registered e.g. blue NIVEA gestures. finger movements from the TWIX ad buildings and even olfactory or tactile markings. trademarks Can any name be registered? This is a popular myth. Entrepreneurs think that since no.
One has ever used a name like theirs registering a trademark at the Patent Office will be a mere formality. It's quite the opposite. The expert examining new applications verifies whether such a mark is not descriptive. Descriptive i.e. one that clearly indicates what you offer under your brand. An example would be the name Super lawyer VIP Meble or eRowery.pl. In any case you don't have to try at all to decipher what to expect. Also check: Reservation of company name. How much does it cost to register in Poland.