Legal Question in Intellectual Property in New York

It would be extremely unusual for a television network to be unique enough in its business operations to obtain a patent. More likely would be protection for trademarks and other intellectual property.

I don't think a TV network was ever patented. Unless you had access to or you have a substantial amount of capital you would be unlikely to prevail. If you took your idea to a company that owned networks (e.g. Time Warner, Comcast, etc.), assuming they'd even read your proposal which they probably would not, you'd run a substantial risk of that company deciding to develop the idea themselves for which you'd have little or no recourse.