US PATENT SUBCLASS 333 / 231
.~.~ With tuning

Current as of: June, 1999
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333 /   HD   WAVE TRANSMISSION LINES AND NETWORKS

219  DF  RESONATORS (DISTRIBUTED PARAMETER TYPE) {7}
227  DF  .~ Cavity resonator {4}
231.~.~ With tuning {1}
232  DF  .~.~.~> Having movable element {1}

DEFINITION

Classification: 333/231

With tuning:

(under subclass 227) Subject matter wherein the cavity has means whereby the cavity can be adjusted to resonate or operate at a specified frequency.