U.S. federal trademark · Serial No. 71635205 · Reg. No. 0582256
THERMIONIC TUBES AND TUBE CIRCUITS OTHER THAN MEASURING AND TESTING CIRCUITS, INCLUDING KLYSTRON TUBES AND KLYSTRON TUBE CIRCUITS SERVING AS OSCILLATORS, AMPLIFIERS, MULTIPLIERS, VARIABLE IMPEDANCES, MODULATORS, MIXERS, AND DETECTORS; AND TRAVELING WAVE TUBES AND TUBE CIRCUITS
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