Originally posted by monochrome
To flog the analogy, no - but they sure do make use of the Douglas Long Beach and Seal Beach assembly facilities. And McAuto sure does own a bucket of useful patents.

Finally something I can speak inteligently about (happens once in a blue moon).
I have intimate experience with both sides of this (Long Beach, Seal Beach and St Louis) and how it effected them.
Boeing bought McD to 1) kill a competitor to their commercial product lines and 2) get a foothold in the military market, which McD had in St Louis.
I think 1) doesnt apply to Ricoh-Pentax, but 2) certainly does as they wanted to get a foothold in the DSLR/Lens selling business.
Shortly after Boeing bought McD, they pretty much canned all of McD commercial in Long Beach, and to this day it is a ghost town where McD used to pump out DC10/MD11, MD80 etc. All that is left are the support centers of the McD commercial world.
Regarding military, the defense industry was doing OK during the time of the merger, but the need for military aircraft soon plummetted (DSLRs maybe?) and Boeing was left with an entire wing of their business that wasn't nearly as profitable as they had hoped and was a hassle to manage. To this day, it is really debateable how serious Boeing still is about their defense products. Like I said, being intimate with the St Louis facility, one can easily make a case for both sides of the argument (that they are or are not serious about their defense products).
But what isn't up to debate is that Boeing pours a lot more resources into commercial than defense. And yes, the defense side is still profitable, but that does not equate to more "exciting products". It means that they are creating more variants of existing products (F-15, F-18 variants), and taking less risk.
So...is there some buyer's remorse from Ricoh for buying Pentax right before (or at least the start of) the decline of DSLR markets? Maybe not, but even the staunchest Ricoh backer has to admit that there is the that possibility.
Now, don't think I am saying that Ricoh plans to not develop the K-mount any further. But i think there is a real possibility that they continue to do small things that don't excite many people (HD coatings, adding DC motors and WR to existing lenses) but still allow them to be profitable.