is Jan Ernst invention still used today
perfume
Ernst Ravenstein's laws, which describe patterns of migration, are still relevant today in understanding migration trends. However, there have been changes in factors influencing migration, such as technology and globalization, which may impact the applicability of his laws in some contexts.
George eastmans invention changed society because he made the camera and still in in use today.
Train, bicycle, pneumatic drill,
yes it is Elijah McCoy's great invention "drip cup" or "lubricated cup" is still used today of course people have upgraded it a bit , but it is still used today
the aztecs said they made popcorn which they actually didn't invent.
Yes, many people have bifocals.
yes i think it is because these are things eye doctors use in today's society
A window
Today Edmond Berger is not considered as the true inventor of spark plug.
The zipper was invented by Whitcomb Judson in 1890 in Chicago. The method he used in his invention is still in use today.
it doesnt involve today. its not a good invention so it doesnt matter