US PATENT SUBCLASS 331 / 42
.~ With particular signal combining means (e.g., cavity mixer)

Current as of: June, 1999
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331 /   HD   OSCILLATORS

37  DF  BEAT FREQUENCY {4}
42.~ With particular signal combining means (e.g., cavity mixer) {1}
43  DF  .~.~> With filter in mixer output circuit

DEFINITION

Classification: 331/42

(under subclass 37) Subject matter wherein the signal combining means is of a particular type, such as the high frequency type (e.g., cavity mixer) or a tuned circuit between oscillator and mixer which circuit may include frequency dividers or multipliers.