Sanjay

Which country are you in ? Here in Australia, there is a law that protects
the copyright of your PCB and Schematic the minute you have created it. You
are protected here by default.

One trick you can do if you want to prove ownership is to post the diagrams
and a PCB to yourself by registered post. Then do not open the package. In
the event of a question of ownership, you can provide a date stamped,
unopened package that contains details of your design and your signature.
If the opposing company cannot prove they had the design before the date of
your posted package, you have a good chance of winning the litigation.

This was used occasionally for protecting copyright in the music industry.

Regards

David Huisman

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