Public Timelines

For educational institutions For teachers For students Cabinet

For educational institutions For teachers For students Open cabinet

FAQ Receber premium

Create a timeline

Public timelines

About & Feedback Acordo Privacidade FAQ

Cabinet Get premium

Donate

2 jan 1929 ano - Creation of the Problem Cylinder by M.E. LaZerte

Descrição:

LaZerte, developed a mechanical cylinder that would check for a correctly inputted answer.

Adicionado na linha do tempo:

Timeline of IDT History

12 jan 2020

0

0

346

Data:

2 jan 1929 ano

Agora

~ 96 years ago

About & Feedback Acordo Privacidade FAQ

Cabinet Get premium

Donate

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

Secured with SSL