[crystalis]

Company A makes patent infringing product. Company A makes puppet Company B that licenses product for <substantial amount of money>, successfully fulfilling any sort of patent infringement limitation you can think of for the low low cost of a few lawyers.

Any policy you think of is going to have ridiculous loopholes and require companies to have patent 'watchdogs' who will need to search out fledgling products to make sure they're not infringing on any patents. These company watchdogs will have to justify their wages... by making even more patent lawsuits than there are now.