Public Timelines

For educational institutions For teachers For students Cabinet

For educational institutions For teachers For students Open cabinet

FAQ Das Premium bekommen

Create a timeline

Public timelines

About & Feedback Vereinbarung Privatheit FAQ

Cabinet Get premium

Donate

30 Sept 1930 Jahr - Prototype polygraph, which was invented by John Larson in 1921, developed for use in police stations

Zugefügt zum Band der Zeit:

Siarra Binion

BySIarra Binion

17 Okt 2017

0

0

520

Datum:

30 Sept 1930 Jahr

Jetzt

~ 95 years ago

About & Feedback Vereinbarung Privatheit FAQ

Cabinet Get premium

Donate

The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.

Secured with SSL