Posted by livy on Sunday, January 31, 2010 at 6:15pm.
when was the:
Nancy Johnson's hand-crank ice cream freezer
Emeline Hart's commercial oven
Ellen Eglin's clothes wringer
sarah mather's submarine telscope
martha coston's saftey flare gun
emily tassey's dredging pump
henrietta vansittart's (improved version)screw propeller for ships
eliza murfey's packing and material process for parts of steam engines
thedosia jones' vacuum canning process to preserve food
thomas edison's phonograph, electric power station and kinetoscope
lummiere brothers' movie projectors
karl braun's major components for television
h. booth and m. spengler's vacuum cleaner
wright brothers' airplane
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