Skip to Content

Tokens — Energy current

InventTable — TOKENS ERA — Machines non-transport

InventionDescriptionYearInventorCountry
Ladder on wall painting 8000 BCE Lascaux France
Sling rock hurling weapon 7000 BCE Sumer Mesopotamia
Drum musical instrument/signal 5000 BCE China
Sickle grain harvest machine 3600 BCE China

Back to InventTable Era: TOKENS ERA Classification: Machines non-transport

Leo Dean Jansen

Leo Dean Jansen, MD is a retired orthopedic surgeon with a special interest in the history of technology.  This web page is the culmination of  his efforts to define and organize the history of technology as seen through 2000 inventions.  TECHNOLOGY:  TABLE, TRUTHS, TIMELINE, TOP 100 represents the 4 parts of this project.

My Work
Information
Contact

leodeanjansentech@gmail.com

Copyright © 2024, Leo Dean Jansen, All Rights Reserved.

Website Design by 1Eighty Digital