Legal Question in Intellectual Property in Massachusetts

The answer to your question is likely to be "yes," but there are things your IP lawyer needs to know that you didn't address in your question to give you a really definitive answer.

You need to contact an IP attorney in your part of the world (there are LOTS of IP firms in the Boston metro area; I have law-school friends whom I respect at Wolf Greenfield in Boston/Cambridge and at Hamilton Brook in Concord) to really get a good handle on what you can do about this employee.

THIS POST CONTAINS GENERAL INFORMATION AND IS INTENDED FOR ENTERTAINMENT PURPOSES ONLY. IT DOES NOT CONSTITUTE LEGAL ADVICE, NOR DOES IT CREATE ANY ATTORNEY-CLIENT RELATIONSHIP. FOR LEGAL ADVICE ON YOUR PARTICULAR MATTER, CONSULT YOUR ATTORNEY.