No one really knows when it was actually invented.
There are no records of whom or where the lever was invented
it was invented before 2013
maybe the pulley but not the lever he invented the pulley but not the lever
it was invented in the early 1343
Lever was known to man since the dawn of the civilisation. It was even before lawyers were invented, so it unluckily could not be patented. http://en.wikipedia.org/wiki/Lever
early 1700s
the lever
Spencer
Archimedes, the Man
The second class lever was not specifically "invented" by a single individual. It is a type of lever identified by the relative positions of the effort, fulcrum, and load. Examples include wheelbarrows and nutcrackers. The concept of levers has been recognized since ancient times.
The lever is generally considered to be the first simple machine invented by humans.
Benjamin Tyler Henry.