# Paul E. Klopsteg

> American physicist (1889–1991); inventor of “Impulse Counter and Stop Watch Timer,” U.S. Patent 2,177,367 (Oct. 24, 1939)

**Wikidata**: [Q7150423](https://www.wikidata.org/wiki/Q7150423)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Paul_E._Klopsteg)  
**Source**: https://4ort.xyz/entity/paul-e-klopsteg


## References

1. [Source](https://findingaids.library.northwestern.edu/agents/people/2409)
2. [Source](https://americanhistory.si.edu/collections/object/nmah_1870818)
3. [Source](https://www.aapt.org/aboutaapt/history/aaptformation.cfm)
4. Library of Congress Authorities
5. [Source](https://www.aapt.org/programs/awards/oersted.cfm)
6. [Source](https://aapt.org/Programs/awards/richtmyer.cfm)
7. [Source](https://www.aapt.org/Programs/awards/millikan.cfm)
8. [Source](https://viaf.org/viaf/data/viaf-20230206-links.txt.gz)
9. Faceted Application of Subject Terminology
10. SNAC