is Jan Ernst invention still used today
perfume
His laws are still relevant to the migration patterns of humans today. Ravenstein's theories of absorption and dispersion are generally true today. The immigration and emigration illegal or legal still apply today.
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
Yes, many people have bifocals.
the aztecs said they made popcorn which they actually didn't invent.
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.
James Watt's invention of the steam engine revolutionized the industrial revolution by providing a more efficient source of power. Today, his invention's principles are still applied in various industries like electricity generation, transportation, and manufacturing, contributing to modern advancements in technology and infrastructure.
it doesnt involve today. its not a good invention so it doesnt matter