Quote Originally Posted by slicktoptt View Post
If you have not signed a contract stating that the product you manufacture is their property, you are legally able to sell it to others. By doing so, you may endanger the original relationship and you may not want to risk that.

In the future you may want to apply for provisional patent on items/tools you produce. You would also be wise to have a standard contract that states you own the manufacturing rights to any products developed during the contract period.
The problem with that attitude is it's a small world. If clients find out it has to be in writing to be confidential with you then you'll either be not trusted or have to sign a contract anytime you do work for them.

I would want that to be a doggone important mountain to fight over before I went there myself.