US PATENT SUBCLASS 332 / 140
.~.~.~.~ With separate modulator tube (e.g., reactance tube)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


332 /   HD   MODULATORS

117  DF  FREQUENCY MODULATOR {6}
137  DF  .~ Including electron discharge device {1}
138  DF  .~.~ Particular oscillator circuit {2}
139  DF  .~.~.~ Crystal oscillator type {1}
140.~.~.~.~ With separate modulator tube (e.g., reactance tube)

DEFINITION

Classification: 332/140

With separate modulator tube (e.g., reactance tube):

(under subclass 139) Subject matter where an electron discharge device distinct from the crystal oscillator performs the actual modulation.