United States Patent 3057547
US Patent References:
/RE22394.html
- - RE22394

/1623204.html
- - 1623204

Rotary alphabet-printing tabulator
- - 1726539

Tabulating machine
- - 1843986

Statistical machine
- - 1950187


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Primary Class:
235/1R
Other Classes:
235/58PS, 235/101, 177/DIG.002
US Patent References:
2508603Sensing mechanism for record cards and the like
2675176Decoding device for statistical machines
2757866Translator for record controlled machines