US PATENT SUBCLASS 178 / 94
.~.~ Pyrographic

Current as of: June, 1999
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178 /   HD   TELEGRAPHY

118  DF  RECEIVERS {4}
89  DF  .~ Code recorders {8}
94.~.~ Pyrographic

DEFINITION

Classification: 178/94

(under subclass 89) Code-recorders in which the record is made by pyros:graphic means or by burning the record into the tape.