Nothing
Harold Amos died in 2003.
Harold Amos was born in 1918.
Dewey Harold Amos has written: 'Geologic map of the Blackford quadrangle, western Kentucky' -- subject(s): Geology, Maps
nothing!
He invented the first ever football tackling dummy
Edward Binney and Harold Smith invented crayons in 1903.
Thomas Edison did not invent the electric chair Harold p brown did...
2012
He invented crayola crayons with his partner Harold Smith
before 1931 when he did the flight with Wiley Post and when he patented it
He is an American electrical engineer and he invented the negative feedback amplifier in 1927.
Amos.