The set square was invented in America in 1860.
The set square was invented in America in 1860.
Philipp Deidesheimer invented the set square in 1860 in America.
The television set was invented in 1933
Philipp Deidesheimer invented the square set in 1860. He got the idea from a honeycomb's structure.
madison
Nobody invented them - they are a characteristic of the set of numbers.
in the late 1930s
David Kusek
sam light
Roland Corporation
sandeep taknauth