__________ is iron that has been made stronger by heat and the addition of other metals.

The __________ helped increase U.S. steel production by drastically reducing the amount of time it took to transform iron ore into steel.

The Menlo Park, New Jersey research center of __________ came to be called the invention factory.

An exclusive right to make or sell an invention is called a __________.

In March 1876, __________ patented the telephone.

__________ and __________ __________ built a light weight airplane with a small gas-powered engine.

The automobile became more widespread after __________ introduced the Model T in 1908.

The need for a reliable source of oil prompted __________ to prove that it was possible to pump crude directly from the ground.

The first __________ powered engine was produced by a German engineer in 1876.