Patent classifications
H
ELECTRICITY
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H04
ELECTRIC COMMUNICATION TECHNIQUE
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H04M
TELEPHONIC COMMUNICATION
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2203/00
Aspects of automatic or semi-automatic exchanges
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H04M2203/25
related to user interface aspects of the telephonic communication service
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H04M2203/251
where a voice mode or a visual mode can be used interchangeably
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H04M2203/253
where a visual mode is used instead of a voice mode
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