H01J 2225/68
Tubes specially designed to act as oscillator with positive grid and retarding
Official title: Tubes specially designed to act as oscillator with positive grid and retarding field, e.g. for Barkhausen-Kurz oscillators
H01J2225/68 (Tubes specially designed to act as oscillator with positive grid and retarding) appears on 0 US grants and 0 published applications in this corpus.
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