Patent classifications
G
PHYSICS
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G04
HOROLOGY
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G04G
ELECTRONIC TIME-PIECES
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9/00
Visual time or date indication means
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G04G9/08
by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques
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G04G9/12
using light valves, e.g. liquid crystals
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G04G9/124
provided with date indication
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