Public Timelines

For educational institutions For teachers For students Cabinet

For educational institutions For teachers For students Open cabinet

FAQ Obtenir le Premium

Create a timeline

Public timelines

About & Feedback Un accord Confidentialité FAQ

Cabinet Get premium

Donate

1 janv. 1970 - Ed Hammer made CFLs with mercury vapor, argon, and a flurescent coating called phosphor

Ajouté au bande de temps:

Light bulb Timeline

2 oct. 2018

0

0

424

Date:

1 janv. 1970

Maintenaint

~ Il y a 55 ans

About & Feedback Un accord Confidentialité FAQ

Cabinet Get premium

Donate

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

Secured with SSL