Originally posted by k100d perhaps you took my comment a bit too seriously and i didn't expand enough. i did read somewhere recently that the patents for the k-mount have expired, and so anyone is free to use them. i think pentax will be fine, they just need to improve their marketting because they definitely have a strong product. but in the unlikely event of all this doom and gloom and Pentax is gone, Samsung has the resources to continue the k-mount if need be and so that no one is left cold with only lenses
The patents for the original k-mount, as used in the K-1000, may have expired, but I'm sure that at least some of the changes made to the system over the years (lens information, autofocus, SDM motors) are, in themselves, patentable. Those patents have probably NOT expired. So, neither Samsung or anyone else could use the k-mount, in its current form, without a license from Pentax.
Given that Samsung presently makes cameras that use the current k-mount, it seems obvious that they already have such a license from Pentax. I have no idea what the terms of the license might be, or how long it is in effect, but, even if Hoya decided tomorrow to exit the camera business, ala Konica-Minolta, Samsung would still have the right to make cameras using the Pentax design.
Besides, if Hoya ever does (let's hope not) exit the camera market, it would still make business sense for them to license the mount, if someone wanted to use it. That's easy money. No R & D, no manufacturing costs, no product liability; just sit back and rake in the license fees. Granted, compared to Hoya's other businesses, this would be peanuts, but I doubt that they would refuse any company that wanted to license the patents.