Patent classifications
G
PHYSICS
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G09
EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
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G09G
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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5/00
Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
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G09G5/02
characterised by the way in which colour is displayed
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