US PATENT SUBCLASS 178 / 48
.~.~ Recorders and receivers

Current as of: June, 1999
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178 /   HD   TELEGRAPHY

2 R  DF  SYSTEMS {21}
47  DF  .~ Harmonic or reed {1}
48.~.~ Recorders and receivers

DEFINITION

Classification: 178/48

(under subclass 47) Receiving or recording instruments for harmonic systems, generally comprising a vibratory element electromagnetically actuated by the pulsating, intermittent, or wave currents peculiar to harmonic systems and employed for interpreting or recording messages.