is Jan Ernst invention still used today
The telephone
It is used for weather and a few other uses.
perfume
By taking pictures and getting a closer view of what your looking at.
it doesnt involve today. its not a good invention so it doesnt matter
Well we use the light bulb everyday or else their would be no light unless it was from the sun!!!
Invention? Whatever...
Yes, many people have bifocals.
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
A window
The zipper was invented by Whitcomb Judson in 1890 in Chicago. The method he used in his invention is still in use today.