Leonarde Keeler, Date of Birth, Place of Birth, Date of Death
TweetLeonarde Keeler
American police officer
Date of Birth: 30-Oct-1903
Place of Birth: North Berkeley, California, United States
Date of Death: 20-Sep-1949
Profession: inventor, police officer
Nationality: United States
Zodiac Sign: Scorpio 
About Leonarde Keeler
- Leonarde Keeler (October 30, 1903 – September 20, 1949) was the co-inventor of the polygraph.
- He was named after the polymath Leonardo da Vinci, and preferred to be called as 'Nard.' He was a Berkeley high school student and amateur magician.
- He was captivated by John Larson’s machine - his so-called 'cardio-pneumo psychogram,' capable of detecting deception, and worked on it to produce the modern polygraph.
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See Also
- Famous People's Birthdays on 30 October, United States
- Famous People's Birthdays in October, United States
- Famous inventor's Birthdays on 30 October, United States
- Famous inventor's Birthdays in October, United States
- Famous police officer's Birthdays on 30 October, United States
- Famous police officer's Birthdays in October, United States
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Agence de presse Meurisse
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| Alternative names | Agence Meurisse | ||
| Description | French | ||
| Work period | between 1909 and 1937 | ||
| Authority control | |||
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Bibliothèque nationale de France
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