Patent classifications
H
ELECTRICITY
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H04
ELECTRIC COMMUNICATION TECHNIQUE
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H04L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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15/00
Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code
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H04L15/04
Apparatus or circuits at the transmitting end
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H04L15/12
with keyboard co-operating with code-bars
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