The patent office is a good place to start but the process is very complex. Since you are, apparently, an engineer you will appreciate the chart in my personal web site
http://www.nortontownsley.com/generic4.html Other than that, you would be well advised to hire a professional, such as myself. Even the patent office will tell you that. Good luck. Call me, if you want.
-------------------------
Norton R. Townsley
Patent Attorney/Professional Engineer
The above message is provided for general information purposes only and is not to be construed as legal advice.