I would love to help, but you have posted this question before. The USPTO records show that he has assigned them to his company (and therefore does not own any patents personally). You need to come at this from the business side, not the patent side.
If he still owned the patent, you would hire a patent attorney to file an assignment with the USPTO that is executed by the Executor of his estate. If the Executor will not do that, then you need to go to court to compel the Executor. The attorney should be someone admitted to practice in CA.
Answered on Sep 25th, 2013 at 9:55 AM