Definition - What does Patent Pending mean?
Patent pending is a term that is often printed on the products to inform the buyers or people interested in the product that an application has already been filed with the patent office. It shows that the process is underway and that the product is still waiting for the patent to be granted. On many products, it is shown as "Pat. Pend."
Justipedia explains Patent Pending
Fraudulent or incorrect use of patent pending printed on products is strictly prohibited in many countries. Some countries like the UK also requires the mention of the patent application number.