There is no information on how many bikes have been invented. The bicycle dates back to the mid 1800s when the pedals were attached to the front wheels.
dirt bikes in the past had less gears and power then dirt bikes have today
Gary Turner invented gt bikes
In 1912 bicycles had been around for several decades.
In the 1950s the pedal bike had already been invented, and in current production - so it couldn't be invented again. There were several companies (Schwinn is one) that manufactured bikes back then.
Mountain bikes were invented around the late1970's. Many different builders.
BMX bikes were invented in 1974. It became official when George E Esser founded the NBL. There is no main manufacturer of BMX bikes but there are many different ones.
bikes
1980
a lot
Japan
bikes
The bicycle was not invented until many centuries after the ancient Romans fall from power. So the answer is a definite: No!