Nothing will protect you like having a filing date for an application with the good ole USPTO.gov people. A non-disclosure agreement is not a substitute for that. Be sure to read and understand the MPEP at USPTO.gov - it`s a few thousand pages, but at least you will save the money of hiring an attorney. Until you have an issued patent, or at least a filed application, you are at the mercy of others.
James Lindon, Ph.D. Patent Attorney
Lindon & Lindon, LLC
Patents, Trademarks, Copyrights, Pharmacy Law, Litigation
[this is not legal advice - provided for discussion only]
Intellectual Property for the Individual and Small Business: Identify, Protect, Enforce, Defend.
"Fools rush in where angels fear to tread."