1 ene 1855 año - Can opener
Descripción:
 Robert Yeates invented the can opener in 1855. A chisel and hammer were needed to open canned foods before this invention.
Source: 
https://en.wikipedia.org/wiki/Pasteurization 
Añadido al timeline:
fecha:
1 ene 1855 año
Ahora mismo
 ~ 170 years ago