Public Timelines

For educational institutions For teachers For students Cabinet

For educational institutions For teachers For students Open cabinet

Create a timeline

Public timelines

About & Feedback Terms Privacy FAQ

Cabinet Get premium

Donate

20h 6min, jan 1, 1952 y - 1952- Cohen- first described principals of biological valve

Added to timeline:

NFP History

12 Nov 2017

0

0

811

Date:

20h 6min, jan 1, 1952 y

Now

~ 73 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