Our latest mug design features the blueprint of an authentication device that generates a key to ensure the sender of an encrypted message is who they say they are. This was invented for banking but Friedman noted in the patent that it had obvious military applications as well. Friedman applied for the patent in 1944 and it was approved in 1950.
On the reverse is:
The Friedman Collection
The George C. Marshall Museum, Lexington, Va.