Public Timelines

For educational institutions For teachers For students Cabinet

For educational institutions For teachers For students Open cabinet

FAQ Get premium

Create a timeline

Public timelines

About & Feedback Terms Privacy FAQ

Cabinet Get premium

Donate

dec 30, 1920 - Diaphragma invented in the 1920 and made a huge class difference in

Added to timeline:

Unit A contraception

19 Oct 2017

0

0

634

Date:

dec 30, 1920

Now

~ 104 years ago

About & Feedback Terms Privacy FAQ

Cabinet Get premium

Donate

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

Secured with SSL