I start where the last man left off.

The greatest invention in the world is the mind of a child.

I try not to invent things that people don't need.

I make more mistakes than anyone else I know, and sooner or later, I patent most of them.

My principal business is giving commercial value to the brilliant - but misdirected - ideas of others.

I never did anything by accident, nor did any of my inventions come by accident; they came by work.