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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
 

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