As patent protection has expired on the '148, perhaps the only reason to continue including it within the MMP Portfolio is to cover prior infringement?
I can see no reason to license individual patents, but do see an advantage in any court case to focus on recertified patents, or those which it is believed will be recertified in the near future.
One has to remember that any damages awarded at trial are for past infringement, and going forward a license will still be required - seek damages on the strongest patents, licence on the full MMP Portfolio.
Why would a company wish to licence individual US patents when there remains the "catch-all" valid European Patent?
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Be well