I think Carson’s company produced the Late Show when Letterman was there and after he left for CBS.
No doubt Letterman’s company gets a nice slice of the Raymond action.
IMHO the best comic show still in reruns is Seinfeld. They are still getting a million a show on TBS and just signed a deal, I think on Amazon Prime, for $800,000 and episode.
Larry David and Jerry Seinfeld will be laughing to bank for years to come.
You are correct about Carson producing Late Night when Letterman was the host. However, when Letterman left for CBS (and Carson retired), full control of the time slot reverted to NBC. Conan’s version of Late Night was initially produced by Broadway Video (Lorne Michael’s company), and later by O’Brien. When Conan got fired from the Tonight Show, NBC gave Michaels control of Tonight and Late Night, and he produces both shows to this day.