Patent classifications
G
PHYSICS
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G06
COMPUTING OR CALCULATING; COUNTING
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G06F
ELECTRIC DIGITAL DATA PROCESSING
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15/00
Digital computers in general; Data processing equipment in general
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G06F15/02
manually operated with input through keyboard and computation using a built-in program, e.g. pocket calculators
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G06F15/0225
User interface arrangements, e.g. keyboard, display; Interfaces to other computer systems
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