Tesla's Earthquake Machine...
(www.forbes.com)
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Tesla did work for Edison.
Edison's team found an improvement on the lightbulb filament -- not from Tesla.
https://www.bulbs.com/learning/history.aspx
Tesla was into gas discharge lighting (no filament) like neon, fluorescent, etc..
A. G. Bell and Edison did the telephone about the same time.
Tesla is the father of radio. He had a radio controlled boat in 1901.
Tesla invented tilt-wing aircraft.
Tesla invented the fluid (as in automatic) transmission.
Tesla invented the fluidic valve.
Thank you for clarifying that for me...