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Pencils are not a modern invention [0], which is why it doesn't fit the question. The ballpoint pen, as an example, is a 19th century patent [1], so pens in gen
by mathgeek 7y ago
Pencils are not a modern invention [0], which is why it doesn't fit the question. The ballpoint pen, as an example, is a 19th century patent [1], so pens in general might fit.
[0] https://en.wikipedia.org/wiki/Pencil#History https://en.wikipedia.org/wiki/Pencil#History
[1] https://en.wikipedia.org/wiki/Ballpoint_pen https://en.wikipedia.org/wiki/Ballpoint_pen