Your first step before making an invention submission is to obtain a patent. Contact a patent lawyer and the United States Patent and Trademark office. The patent lawyer will allow you to from the submission process that assist insure that you will be legally shielded from any potential problems. There's a fee, but since this can change, it's always best to contact the USPTO yourself. This protects your invention and idea from getting stolen.
The next move is to locate a list of companies who accept invention submissions. As an example, if the invention is due to cars, then find an auto-related company which is ready to accept reviewing invention submissions. Many of these companies recommend that you patent your idea first. This protects you together with prevents problems for example idea theft from occurring. You can search on the net for potential companies, or call businesses that appeal to you and get when they review patented inventions.
This is a great choice for a big company. A great idea will help increase their profits. They could already have the idea, however, you got the patent before they did. As a result a partnership worth looking at. They've got the resources plus you've got the concept. Just make sure they compensate you adequately.
So, when you have an invention, consider making invention submissions to relevant companies. This could help increase your own personal profits and removes you from the development process. Just make sure to patent your idea before you decide to share your invention using a company.