Re: I'd like to know, if any of you have ever submitted an invention to ISC?
I'm not familiar with this company, but a general rule of thumb is that any outfit promising to promote your invention for a fee is not worth the money. I have yet to see any of these companies that actually was able to reliably deliver what they claim.
Selling your own invention is hard, and takes a lot of legwork and persistence, but if it's any good, a real company will eventually buy it from you or license it for production. Sometimes, depending on how complicated or expensive it is to make, you can make your invention yourself and peddle it to stores and such.