Conversation so far:
What did Lee de Forest create?
Lee de Forest's most famous invention was the three-element Audion vacuum tube, the first practical amplification device.
Did Lee de Forest make anything else?
Lee de Forest claimed to have invented a variation on the arc transmitter, which created steady wave signals that could be used for amplitude modulated audio transmissions.

Question: Did he go to college to learn about this
Self-contained rewrite: Did Lee de Forest go to college to learn about inventing?