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2611539
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Patent Grant
2611539
References
Source
Patent Number
2,611,539
Date Filed
Not available
Date Issued
Tuesday, September 23, 1952
71 years ago
CPC
G06C15/20 - adapted for short-cut multiplication or division
G06C7/08 - with one set of keys for all denominations
US Classifications
235 - Registers
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