A more thorough explanation:

A patent solicitor is a specialized legal professional who prepares and prosecutes patent applications before the Patent and Trademark Office. They are not necessarily licensed lawyers, but they must be licensed by the Patent and Trademark Office. They are also known as patent agents or registered patent agents.

For example, if a company wants to patent a new invention, they may hire a patent solicitor to help them prepare and file the necessary paperwork with the Patent and Trademark Office. The patent solicitor will work with the company to ensure that the patent application meets all the legal requirements and is as strong as possible.