My point was not that any machine cannot be reverse engineered or even that the theory behind construction of devices could be kept secret for a long time. It was that a working machine correctly demonstrated to the right people (that is why I suggested that Mark should give Jed a few) would unleash a tidal wave of people offering deals, venture/manufacturing capital etc. The fact that they would be able to invent their own machines in a matter of months or a year or two is irrelevant. Commercial pressures would demand that they hit the ground running and innovate and refine later. It would be important to show devices to numerous competing factions simultaneously to avoid any attempts to "buy up" the devices with a view to burying them. I cannot see that any patent Mark could possibly get could get a stranglehold on operation and manufacture of such devices somebody will always figure out a way round patents, particularly with these stakes involved - I do not think Mark will ever be a trillionaire from this, but multi millions or low billions may be achievable.
Nick Palmer