Public Timelines

For educational institutions For teachers For students Cabinet

For educational institutions For teachers For students Open cabinet

FAQ Ricevere il Premium

Create a timeline

Public timelines

About & Feedback Accordo Privatezza FAQ

Cabinet Get premium

Donate

2 gen 1929 anni - Creation of the Problem Cylinder by M.E. LaZerte

Descrizione:

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

Aggiunto al nastro di tempo:

Timeline of IDT History

12 gen 2020

0

0

351

Data:

2 gen 1929 anni

Adesso

~ 96 years ago

About & Feedback Accordo Privatezza FAQ

Cabinet Get premium

Donate

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

Secured with SSL