Famous inventions and inventors.

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:

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: