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Author Topic: May 5 is Peter Cooper Hewitt's birthday.  (Read 5390 times)
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Patrick J. / KD5OEI
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« on: May 04, 2016, 10:04:02 AM »
May 5 is Peter Cooper Hewitt's birthday.

Peter Cooper Hewitt (May 5, 1861 – August 25, 1921) was an American electrical engineer and inventor, who invented the first mercury-vapor lamp in 1901 and mercury rectifier in 1902.
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