How did the shipwright Tom get the blueprints to the Pluton? In the anime Tom is the best shipwright there is, but how did he get the blue prints to the Pluton. Did he write them himself, and if so how did he get the information needed to do so?
Franky explains this, before destroying the blueprints. According to him, the best shipwrights of the world created Pluton to counter the ancient weapon "Poseidon".

I don't think any names have been mentioned, but it is safe to assume that the blueprints were handed down to Tom from his master.