with a restricted number of keys, e.g. separate key for each type of code element

Introduced: September 1968

Last revised: January 2006

Full Title

Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code > Apparatus or circuits at the transmitting end > with a restricted number of keys, e.g. separate key for each type of code element

Classification Context

Section:: ELECTRICITY
Class:: ELECTRIC COMMUNICATION TECHNIQUE
Subclass:: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION

2 direct subcodes

Child Classifications

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H04L 15/08 with a single key which transmits dots in one position and dashes in a second position
H04L 15/1 combined with perforating apparatus