The inventor of the first printing press:
The inventor of the first telegraph:
The inventor of the radio:
The inventor of the telephone:
The inventors of the airplane:
The inventor of the phonograph:
The inventor of the chemical battery:
He discovered the Law of Gravitation:
The inventor of the electric bulb:
He was the first to discover the X- Rays:
The inventor of the ball-point pen:
He invented television:
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