Answer:
Explanation:
i know you said 4 but i gave you a few extra to choose from
Spinning Jenny. The 'Spinning Jenny' was an engine for spinning wool or cotton invented in 1764 by James Hargreaves, who had it patented in 1770. ...
Newcomen steam engine. ...
Watt steam engine. ...
The locomotive. ...
Telegraph communications. ...
Dynamite. ...
The photograph. ...
The typewriter.
