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Name
Number
Author
Published
stock market ticker
72742
Laws, Samuel S.
1867
cash register
221360
Ritty, James
1879
cash register
271363
Birch, Ritty
1883
adding machine
371496
Felt, Dorr E.
1887
calculator
388116
Burroughs, William S.
1888
punch card tabulation
395781
Hollerith, Herman
1889
computer
395782
Hollerith, Herman
1889
cash register
924616
Kettering, Charles F.
1909
supermarket
1242872
Saunders, Clarence
1917
supermarket
1357521
Saunders, Clarence
1920
microfilm camera
1806763
George McCarthy
1931
xerography
2221776
Carlson, Chester
1940
xerography (original photocopier)
2297691
Carlson, Chester F.
1942
carbon-less paper
2299693
Green, Barrett K.
1942
justifying typewriter
2379862
Bush, Vannevar
1945
modern photocopier
2812709
Gundlach, Robert
1957