"I am not a scientist. I am an inventor."

"I owe my success to the fact that I never had a clock in my workroom. Seventy-five of us worked twenty hours every day and slept only four hours — and thrived on it."

"I never did a day's work in my life. It was all fun."

"I have friends in the electrical industry who would be very happy to see me dead."

"I never perfected an invention that I did not think about in terms of the service it might give others. I find out what the world needs, then I proceed to try and invent it."