Patent troll is a critical term that is used for an individual or a company that implements its patents in opposition to more than one-suspected violators in a manner that is considered as being overly opportunistic or aggressive.

Patent trolls may acquire patents inexpensively from other units not keenly looking for enforcing them. For instance a corporation may acquire a number of patents a company which is forced by liquidation to sell the patents. In another way, the lindsay patent attorneys keep a watch on the technologies that are not developed yet and wait for the inventors who are independent to market the products, suing them after they are well into the technology.