Patent Pirates… They are always out there. So always be cautious when presenting your ideas or concepts. Always have an NDA record of meeting.
A Patent Pirate is someone who willfully and maliciously commits patent infringement in the hope of financial gain.
Paten trolls, someone or a 3rd party who defends their patent with the undue threat of legal action with no intention to market or manufacture the patented invention. Someone who utilizes a “submarine patent”. A submarine patent is a patent whose issuance and publication are intentionally delayed by the applicant for a long time which can be several years or decades.