Now, what I would like to find is a patent for the gear and ratchet speed control used on the later model D panorams. I'm referring to the gears mounted at the bottom end of the swinging lens shaft.

I can't imagine that Kodak would introduce that new method of controlling the speed of the swinging lens and not protecting it with a patent. I checked with Bill McBride, a leading expert on the Panoram, and he knows of no such patent ever having been obtained by Kodak.

It is possible that the basic design was invented and patented by another person or company and Kodak made their mechanism under a license from the patent holder. I don't know where to look . . . it is quite possible that mechanism was actually designed to govern the speed of some other device unrelated to cameras.