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13013. Invention
Invention : bifocal lens
Year : 1784
Inventor : benjamin franklin
Country : us.

13014. Invention
Invention : bikini
Year : 1946
Inventor : louis reard
Country : france.

13015. Invention
Invention : blood bank
Year : late 1930s
Inventor : charles richard drew
Country : us.

13016. Invention
Invention : blow-dryer
Year : 1920
Inventor : racine universal motor co., hamilton beach manufacturing co.
Country : us.

13017. Invention
Invention : bomb, atomic
Year : 1945
Inventor : j. robert oppenheimer, et al.
Country : us.

13018. Invention
Invention : bomb, thermonuclear (hydrogen)
Year : 1952
Inventor : edward teller, et al.
Country : us.

13019. Invention
Invention : boomerang
Year : c. 15,000 years ago
Inventor : aboriginal peoples
Country : australia.

13020. Invention
Invention : braille system
Year : 1824
Inventor : louis braille
Country : france.

13021. Invention
Invention : brassiere (bra)
Year : 1913
Inventor : mary phelps jacob
Country : us.

13022. Invention
Invention : bread, sliced (bread-slicing machine)
Year : 1928
Inventor : otto frederick rohwedder
Country : us.

13023. Invention
Invention : button
Year : c. 700 bc
Inventor : greeks, etruscans
Country : greece, italy.

13024. Invention
Invention : buttonhole
Year : 13th century
Inventor : -
Country : europe.

13025. Invention
Invention : calculator, electronic hand-held
Year : 1967
Inventor : jack s. kilby
Country : us.

13026. Invention
Invention : calculus
Year : 1680s
Inventor : sir isaac newton and gottfried wilhelm leibniz (invented separately)
Country : england and germany (respectively).

13027. Invention
Invention : calendar, modern (gregorian)
Year : 1582
Inventor : pope gregory xiii
Country : italy.

13028. Invention
Invention : camcorder
Year : 1982
Inventor : sony corp.
Country : japan.

13029. Invention
Invention : camera, motion picture
Year : 1891
Inventor : thomas alva edison, william k.l. dickson
Country : us.

13030. Invention
Invention : camera, portable photographic
Year : 1888
Inventor : george eastman
Country : us.

13031. Invention
Invention : can, metal beverage
Year : 1933
Inventor : american can co.
Country : us.

13032. Invention
Invention : can opener
Year : 1858
Inventor : ezra j. warner
Country : us.

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