A compass, because it was made by more than one person it was by different groups of people.
Electric Bulb
Exactly that...that one invention leads to another invention. For example. The invention of the car, led to the invention of the assembly line
Well one way is independent invention
Nano shells.
One example is a router.
One example is a switch.
when other historians will argue that different cultures come up with the same ideas to address similar problems and that is evidence of independent invention.
The term for a trait with many cultural hearths that developed independent from each other.
The Invention of the Telegraph by Joseph Henry in 1831 led to the invention of the phone.
Yes, most or all people would consider a ladder to be one.
Invention of scripting and painting revolutionized Ignorance. it is one of the example.
An example for the independent protist is that they can't live without the host.