the cotton gin
Radio was not an important invention in the early 20th century. Instead it was developed by Heinrich Hertz in the 18th century. The cotton gin (APEX)
The Steamboat
The Steamboat
The cotton gin
the locomotive
Cotton Gin
Radio was not an important invention in the early 20th century. Instead it was developed by Heinrich Hertz in the 18th century. The cotton gin (APEX)
The Steamboat
The Steamboat
The Steamboat
The cotton gin
The cotton gin
the locomotive
Radio was not an important invention in the early 20th century. Instead it was developed by Heinrich Hertz in the 18th century. The cotton gin (APEX)
To accurately answer your question, I would need to know the specific inventions you're referring to. However, common inventions from the early 20th century include the airplane, the radio, and the assembly line. If you provide a list of options, I can help identify which one was not considered an important invention from that era.
The steamboat
The steamboat -