See, for example, Clifford Cocks who invented RSA before RSA did, but was unable to patent it, and thus didn't get the profits that RSA did.
He got a nice medal though.
If that's the case, then why wasn't the RSA patent revoked due to prior art?
Re:The Patent Protection Racket
by jacques_chester on Tuesday April 02, 2013 @10:03PM
(#5483728)
Prior art has to be published.
For some strange reason, Her Majesty's cryptographers at GCHQ were loathe to give up all their classified goodies during the cold war. :)
Of all the things...
Cryptography is math in this day and age. Patents on crypto are patents on math, with only the measly "ON A COMPUTER!!!!" clause justifying their existence.