I think you should see an attorney with intellectual property experience as soon as possible, as you might have a statute of limitations problem. Try to get a 1/2 hour "free initial consultation" and be prepared to show all your communications with the firm and all subsequent information showing that they are using your idea and that they are making money from it. Unless the major corporation carried on some communications with you, your case is relatively weak, since merely submitting an idea usually creates little or no obligation, but it's certainly worth a try. I assume your "invention" is neither patented (by you) or patent pending.

I am well versed in intellectual property, and the laws specifically pertaining to sale of ideas, and protection of ideas and inventions even when they are not patented, as part of the process of selling inventions to businesses. It sounds like it may be a strong case. I handle some cases on a contingency fee basis. Please contact me immediately so we may discuss this matter.

Best,

Daniel Bakondi, Esq.

danielbakondi@yahoo.com

415-450-0424

The Law Office of Daniel Bakondi, APLC

870 Market Street, Suite 1161

San Francisco CA 94102

http://www.danielbakondi.com

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As a Franchise Attorney I can say the following. In addition to a statute of limitations issue (you say "odd years later") did you have them sign a nondisclosure or similar agreement? If not, I agree with the first attorney answer - the case is very weak. But it doesn't hurt to consult with a good intellectual property or franchise attorney in your area for specific advice.

Mr. Franchise - Kevin B. Murphy, B.S., M.B.A., J.D.

Franchise Foundations, a Professional Corporation