Patent classifications
H
ELECTRICITY
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H04
ELECTRIC COMMUNICATION TECHNIQUE
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H04M
TELEPHONIC COMMUNICATION
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Substation equipment, e.g. for use by subscribers
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H04M1/02
Constructional features of telephone sets
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H04M1/23
Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof
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H04M1/233
including a pointing device, e.g. roller key, track ball, rocker switch or joystick
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