CH234228A (en )1944-09-15 Diode oscillator. CH232472A (en )1944-05-31 Relay station for the transmission of high frequency oscillations. CH217640A (en )1941-10-31 High frequency amplifier circuit. FR859813A (en )1940-12-30 Vision frequency amplifier CH219822A (en )1942-02-28 Circuit for influencing the modulation depth of an amplitude-modulated oscillation. DK50601C (en )1935-09-02 Receive switch for generating an interference frequency. CH230610A (en )1944-01-15 Circuit for generating frequency-modulated high-frequency oscillations. CH275994A (en )1951-06-15 Frequency change circuit. CH212950A (en )1940-12-31 Procedure for voltage-controlled frequency change. AT192960B (en )1957-11-11 Circuit arrangement for increasing or decreasing the degree of amplitude modulation of an electrical oscillation CH228587A (en )1943-08-31 Device for the transmission of messages. CH224074A (en )1942-10-31 Carrier frequency modulator. CH229097A (en )1943-09-30 Device for frequency modulation. DK61992C (en )1944-03-06 Coupling for Amplification of Electrical Oscillations. CH235397A (en )1944-11-30 Frequency modulation circuit for at least approximately constant frequency deviation. FR887697A (en )1943-11-19 Frequency modulation AU111214B2 (en )1940-08-22 Improvements in or relating to circuit arrangements for influencing the modulation depth ofan amplitude-modulated oscillation GR7389B (en )1938-05-23 APPLIANCE FOR APPLIED ART OF THE PNEUMATH. DK58169C (en )1940-11-18 Oscillation circuit for short electromagnetic waves. DK69334C (en )1949-06-13 Coupling for stabilizing oscillators for frequency modulated high frequency oscillations. AT160200B (en )1941-02-25 Oscillator circuit. CH203268A (en )1939-02-28 Frequency converter. DK62857C (en )1944-11-06 Frequency modulation coupling. CH225927A (en )1943-02-28 Process for obtaining the active components of Calebassen-Curare. CH221751A (en )1942-06-15 Amplitude modulation arrangement.