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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G09G5/00 Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
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G09G5/18 Timing circuits for raster scan displays
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