Patent marking refers to the act of displaying a patent number (or patent application number) on a patented product.
Whilst patent marking is not compulsory in UK, there are numerous advantages to marking a patented product with the relevant patent details. However, it is important that patent marking is performed correctly as there are adverse consequences for falsely marking a product in the UK and in other countries.
Patent marking is a recognised and encouraged practice in many countries. However, the requirements differ from country to country, as do the consequences for incorrectly marking a product. The comments below describe the situation in the UK. If you require details of patent marking requirements in other countries, please get in touch.