Ballpoint pen
device · 1938 · Electric age
Bíró’s pen with a ball at the tip.
Inventor: Marcel Bich.
What it is made of
- Ball bearing — has part. A ball in a socket — essentially a ball bearing.
Principles and materials it uses
- Ink — uses. Thick oil-based ink.
History: what it evolved from and what it influenced
- Fountain pen — evolved from. A replacement for the fountain pen.