His most important invention may have been the spin-scan camera, which he developed in 1964.

His most important invention was the gas turbine with a closed circuit.

What's the most important invention of the past century?

"To me, that is the important invention of the project," he said.

And the sailing ship was also a pretty important invention.

"Have him tell us about some of the most important inventions."

It ranks as one of the most important inventions ever made.

A very able man, he made several important inventions on his own.

His most important invention was that of the table steam engine.

The two most important inventions in the history of the human race were writing and printing.