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Apr 13, 1440
Printing press
It was made by Richard M. Hoe. It was used to make multiple copies faster -
Submarine
It was made by John holland. It was created to travel under the water instead of on top of it -
Clock
It was made by Eli Terry. It was made to tell time -
Cotton Gin
It was created by Eli Whitney. The machine separated cotton and the seeds. -
Steamboat
It was created by Robert Fulton. They were used to transport goods and people. -
Waterwheel
It was made by Lester Peston. It is used to create electricity by water. -
Fountain Pen
It was created by Lewis Waterman. It was created so you don't have to write with a quill -
Telegraph
It was made by Samuel Morse. It was used to to send messages to people faster. -
Metal Plow
It was created by John Deere. It was created because wooden plows kept on breaking -
Door Lock
it was made by Linus Yale. it is used to lock doors -
Iron truss Bridge
It was made by Squire Whipple. They were made because they were more reliable -
Dynamite
Alfred Nobel invented it. It is used to blow stuff up
