# L. Payen
**Wikidata**: [Q65556311](https://www.wikidata.org/wiki/Q65556311)  
**Source**: https://4ort.xyz/entity/l-payen


## References

1. [Source](http://www.computinghistory.org.uk/det/5931/The-Arithmometer-was-the-first-commercially-successful-mechanical-calculator-patented/)
2. [Source](http://www.arithmometre.org/Anatomie/Constructeurs.html)
3. [Source](http://www.arithmometre.org/Anatomie/NumerosSerieEnglish.html)
4. [Source](https://www.globe-antique.com/products-categories/scientific-instruments/drawing-instruments/arithmometer/)
5. Source
6. [Source](http://mmb-web.adlibhosting.com/ais54/Details/collect/18780)