# ballpoint pen

> writing implement

**Wikidata**: [Q160137](https://www.wikidata.org/wiki/Q160137)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Ballpoint_pen)  
**Source**: https://4ort.xyz/entity/ballpoint-pen


## References

1. [Source](https://patents.google.com/patent/US392046A/en)
2. [Source](https://www.pens.com/blog/the-inventor-behind-the-modern-ballpoint-pen/)
3. [Source](https://github.com/JohnMarkOckerbloom/ftl/blob/master/data/wikimap)
4. Freebase Data Dumps. 2013
5. BabelNet
6. Quora
7. National Library of Israel
8. KBpedia