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A glass conservatory in London, the Great Exhibition -
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B. Tyler Henry, chief designer for Oliver Fisher Winchester's arms company -
First 4-Wheel roller skates. -
Pithole, Pennsylvania, Samuel van Syckel's five-mile -
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Used to play "Mary had a little lamb its fleece was white as snow." -
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The Ear Trumpet -
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Jesse W. Reno, a conveyor belt used for passengers. -
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