Make contact with a business attorney you think you can trust -- not necessarily to retain them now, but so that you'll be acquainted when your business gets go

Make contact with a business attorney you think you can trust -- not necessarily to retain them now, but so that you'll be acquainted when your business gets going. Add a little extra to the margin in your pricing for a legal war chest. Make sure that money stays liquid. If you receive a patent threat from someone, call up your attorney friend and pay him to respond with a letter.