The quote I remember from Edison is "Genius is 10% inspiration and 90% perspiration." The Oatmeal cartoon about Tesla v Edison is spot on when the author says "Edison was a CEO." While Edison came up with ideas it was largely the perspiration of his hired staff that refined those ideas until Edison could determine the monetary worth/practicality of a concept.
If you're interested in some of Edison's legal maneuvering, the movie industry is a good place to start. Edison formed a cabal (incorporated into a trust fund) of patent holders that in essence became the sole arbiter of what films would be made, the running times, and that no credits for actors be part of the film. This led to the forming of independent studios and distributors that had to fight hundreds of lawsuits by the Edison trust, and the thugs hired to intimidate and vandalize any exhibitor that refused to allow Edison to dictate how their businesses were run... all hiding behind patent law. Sound familiar? The thugs aren't physical these days; they wear pin strip suits and put the word "Esquire" at the end of their names...
I've known a few successful people and a common thread between them is an uncommon drive to succeed. Edison for all his warts managed to shepherd a lot of invention to market.
Nowadays we have patent trolls who prosper on the asymmetry between gaining rights to a patent and cost of defending against charges of infringement. A friend with a small business literally just a few days ago was put out of business by a cease and desist lawsuit claiming patent infringement (lacking merit IMO) that he couldn't afford to defend against the charges even though in the right. Justice isn't free or even cheap.
Congress is reviewing ways to correct this or at least reduce abuse (business methods patents are the current hot area), but the reality is you can win a patent for low tens of thousands, and spend hundreds of K to millions in court defending against charges of infringement.
No obvious simple answers, and the lawyers** manage to get well paid coming and going.
** Shakespeare had a prescient line in Henry VI regarding what to do with lawyers.