These pair of game shows randomly came to mind earlier today & it made me wonder...who currently owns the rights to the one season blunders, I mean, wonders know as Family Secrets & The Moneymaze?
In the case of the latter, Ron Greenberg and the estate of Don Lipp seem to have format rights (they tried to revive it a decade ago), while whatever remains of the actual program appears to be the property of Dick Cavett (who still controls Daphne Productions).
The former is more confused: Dave Bell Associates (which packaged the series) has dissolved and Dave Bell is deceased, but I'm not sure as to either where their rights went, or what rights the company (which largely produced documentaries and programs in other genres) had over the format as a whole.