Title:
Electronic multiplying device
United States Patent 2575331


Inventors:
Compton, Justin S.
Kilheffer, Lawrence D.
Application Number:
US62297845A
Publication Date:
11/20/1951
Filing Date:
10/18/1945
Assignee:
NCR CO
Primary Class:
International Classes:
G06F7/498; G06F7/52
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US Patent References:
2502360Electronic computer1950-03-28
2484115Carry device1949-10-11
2442428Calculating device1948-06-01
2404697Calculating device1946-07-23
2404047Electronic computing device1946-07-16
2402988Accounting apparatus1946-07-02
2401621Electronic accumulator1946-06-04
2398771Electronic device1946-04-23
2354768Electrical counter1944-08-01
2346616Multiplying machine1944-04-11
2310105Counter circuit1943-02-02
2176932Electrical calculating machine1939-10-24
1982020Tabulating machine1934-11-27
1848106Key adding device for tabulating machines1932-03-08