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1986-08-29
Piege de frequence image suivant les variations d'accord
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1935-01-01
Series coupled amplifier
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1992-12-01
Selectable dual rectifier power supply for musical amplifier
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2008-08-26
Selectable power supply for audio amplifier
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1939-03-28
Receiving system
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1941-02-18
Biresonant circuit
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1939-03-07
Radio receiving apparatus
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1936-05-19
Automatic volume and fidelity control
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1933-12-05
Wireless communication apparatus
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1930-08-19
Vacuum-tube circuits and the like and method of controlling the same
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1993-06-11
전송선로 트랜스를 주축으로한 케이블 다중방송 송출 및 전송장치
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1930-09-09
Modulating system for high-frequency currents
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Copper-Oxide Rectifier Used for Radio Detection and Automatic Volume Control
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1939-01-10
Radio receiver
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1936-07-21
Low frequency amplifier
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1935-02-05
Volume control device for electron tube systems
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1929-07-23
Radio signaling system
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1994-04-01
Amplificateur de puissance push-pull contre-réactionné par transformateurs en ondes métriques.
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1932-03-15
Radioreceiver
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1924
Radio Theory Simplified
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1922
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2002-03-20
Antenna device and electromagnetic detection device comprising such antenna device