Just read the PR from TPL. They say it was purchased from them, TPL.
http://www.prnewswire.com/news-releases/dresser-inc-purchases-mmp-portfolio-license-according-to-patriot-scientific-corporation-103745584.html
Dresser, Inc. has purchased an MMP™ Portfolio license from The TPL Group.
So PTSC and TPL announce the sale. Have they patched things up?