as i understood it you can patent improvements on patented technology even if you don't hold those patents. You just can't ever use your improvements without a license.
If that really is true, then Paul Allen isn't infringing, the people who are licensing from him are.
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> because he makes nothing
He does license patents, if IBM can prove one the licensed patent is based on one or more IBM patents, they could counter sue.
as i understood it you can patent improvements on patented technology even if you don't hold those patents. You just can't ever use your improvements without a license.
If that really is true, then Paul Allen isn't infringing, the people who are licensing from him are.