Forgive me but I am obligated to say this: It should be understood that my comments here are not legal advice and do not form an attorney-client relationship with anyone, rather I am offering personal opinion and general information to my friends in the NSX community.
With that out of the way, I find myself nodding in agreement with saht's and NSXLVR's posts. One thing that is frequently overlooked is: a patent grants a right of exclusion. In other words, it grants you the right to keep others from making, using, or selling your patented invention. However, it does not grant you the free & clear right to make, use, or sell it. You think, how can this be???
There are two main aspects to the patent game. First is that to get a patent, your invention must be new, useful, and non-obvious.
New=Your EXACT invention has never been disclosed previously.
Useful=Your invention does something - easy to meet this requirement.
Non-Obvious=Where the money is. VERY basically, that your invention goes beyond a solution at which a person of ordinary skill would have arrived.
(BTW these are for a US patent - other countries have their own standards)
The second is that your commercial product, even it you've patented certain aspects of it, must not infringe on someone else's patent(s).
The classic example: You invent the chair. Your patent claims a seat, a back, and four legs. Nobody else can make, use, or sell a chair without infringing on your patent.
Now someone else invents the rocking chair. His patent claims a chair with a seat, a back, four legs, and two rockers fixed to the bottom of the legs. However, he cannot make, use or sell his rocking chair without first obtaining a license from chair guy. Chair guy can't make a rocking chair without first obtaining a license from rocking chair guy. At this point the laws of economics apply, and they cross-license so that both may profit from their inventiveness.
Now, a third guy comes along an invents the stool: a seat and four legs. He applies for a patent but is denied, since a seat and four legs has already been disclosed by chair guy. BUT stool guy can go ahead and make, use, and sell all the stools he wants, since his stool has no back and thus doesn't infringe on the chair patent.