an electrical switch for railroads
Philip downing invented the mailbox
october 27,1891
The credit of inventing the protective public mailbox(letter-box) goes to the Philip B. Downing, who was from Boston, Massachusetts, had been awarded a U.S. patent(No.462,093) for animprovement to the street letter (mail) box on Oct. 27, 1891.http://www.briskinfo.com/inventions/who-invented-street-letter-drop-mailbox.html
Philip Emeagwali did not invent the computer
yes
submarine
for some use
NO
no
Philip emeagwali is fast with computers and even faster with the truth.
The phonograph
baby eating