Now you Know

13067. Invention
Invention : coupon, grocery
Year : 1894
Inventor : asa candler
Country : us.

13068. Invention
Invention : crayons, children's wax
Year : 1903
Inventor : edwin binney, c. harold smith
Country : us.

13069. Invention
Invention : cream separator (dairy processing)
Year : 1878
Inventor : carl gustaf patrik de laval
Country : sweden.

13070. Invention
Invention : credit card
Year : 1950
Inventor : frank mcnamara, ralph schneider (diners' club)
Country : us.

13071. Invention
Invention : crossword puzzles
Year : 1913
Inventor : arthur wynne
Country : us.

13072. Invention
Invention : ddt
Year : 1874
Inventor : othmar zeidler
Country : germany.

13073. Invention
Invention : defibrillator
Year : 1952
Inventor : paul m. zoll
Country : us.

13074. Invention
Invention : dentures
Year : c. 700 bc
Inventor : etruscans
Country : italy.

13075. Invention
Invention : detector, metal
Year : late 1920s
Inventor : gerhard fisher
Country : germany/us.

13076. Invention
Invention : detector, home smoke
Year : 1969
Inventor : randolph smith, kenneth house
Country : us.

13077. Invention
Invention : diamond, artificial
Year : 1955
Inventor : general electric co.
Country : us.

13078. Invention
Invention : diapers, disposable
Year : 1950
Inventor : marion donovan
Country : us.

13079. Invention
Invention : digital videodisc (dvd)
Year : 1995
Inventor : consortium of international electronics companies
Country : japan, us, the netherlands.

13080. Invention
Invention : dishwasher
Year : 1886
Inventor : josephine cochrane
Country : us.

13081. Invention
Invention : dna fingerprinting
Year : 1984
Inventor : alec jeffreys
Country : uk.

13082. Invention
Invention : doughnut (ring) or donut
Year : 1847
Inventor : hanson crockett gregory
Country : us.

13083. Invention
Invention : door, revolving
Year : 1888
Inventor : theophilus von kannel
Country : us.

13084. Invention
Invention : drinking fountain
Year : c. 1905-1912
Inventor : luther haws, halsey w. taylor (invented separately)
Country : us.

13085. Invention
Invention : dry cleaning
Year : 1855
Inventor : jean baptiste jolly
Country : france.

13086. Invention
Invention : dynamite
Year : 1867
Inventor : alfred nobel
Country : sweden.

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