US PATENT SUBCLASS 341 / 71
.~.~ To or from bi-phase space or mark codes (e.g., double frequency code, FM code)

Current as of: June, 1999
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341 /   HD   CODED DATA GENERATION OR CONVERSION

50  DF  DIGITAL CODE TO DIGITAL CODE CONVERTERS {38}
68  DF  .~ To or from NRZ (nonreturn-to-zero) codes {6}
71.~.~ To or from bi-phase space or mark codes (e.g., double frequency code, FM code)

DEFINITION

Classification: 341/71

To or from bi-phase space or mark codes (e.g., double frequency code, fm code):

(under subclass 68) Subject matter for converting digital signals to or from other digital signals wherein there is a transition at the beginning of every bit cell and (a) a one is no second transition and a zero is a second transition half a bit period later, or (b) a one is a second transition half a bit period later and a zero is no second transition.