| US2518931A
              (en)
            
            * |  | 1950-08-15 |  | Wave-guide | 
        
          | DE741721C
              (de)
            
            * | 1940-10-22 | 1953-05-04 | Siemens & Halske A G Berlin Un | Einrichtung zur Demodulation frequenzmodulierter Schwingungen | 
        
          | US2475779A
              (en)
            
            * | 1941-05-14 | 1949-07-12 | Rca Corp | Wave length modulator and control means | 
        
          | US2438801A
              (en)
            
            * | 1942-02-27 | 1948-03-30 | Rca Corp | Monitoring and measuring apparatus for frequency modulated signals | 
        
          | US2462856A
              (en)
            
            * | 1942-05-19 | 1949-03-01 | Sperry Corp | Transmitter and/or receiver circuits | 
        
          | BE453137A
              (en:Method)
            
            * | 1942-11-12 |  |  |  | 
        
          | US2426193A
              (en)
            
            * | 1943-06-17 | 1947-08-26 | Rca Corp | Radio transmitter automatic volume control | 
        
          | US2425614A
              (en)
            
            * | 1943-09-16 | 1947-08-12 | Rca Corp | Controlled carrier amplitude communication system | 
        
          | BE461892A
              (en:Method)
            
            * | 1944-01-05 |  |  |  | 
        
          | US2447492A
              (en)
            
            * | 1944-04-15 | 1948-08-24 | Rca Corp | Timing modulation | 
        
          | US2435010A
              (en)
            
            * | 1944-11-27 | 1948-01-27 | Gen Railway Signal Co | Continuously checked communication system | 
        
          | US2617015A
              (en)
            
            * | 1945-01-23 | 1952-11-04 | Everard M Williams | Panoramic system | 
        
          | US2482914A
              (en)
            
            * | 1945-06-27 | 1949-09-27 | Rca Corp | Signaling | 
        
          | US2503243A
              (en)
            
            * | 1945-12-11 | 1950-04-11 | Cohen Albert | Electrodynamic relay | 
        
          | US2555391A
              (en)
            
            * | 1946-03-04 | 1951-06-05 | Arthur A Glass | Radio oscillator control | 
        
          | US2510461A
              (en)
            
            * | 1946-04-09 | 1950-06-06 | Raytheon Mfg Co | Multistation microwave communication system | 
        
          | BE487775A
              (en:Method)
            
            * | 1948-03-10 |  |  |  | 
        
          | US2604585A
              (en)
            
            * | 1948-04-10 | 1952-07-22 | Louis W Parker | Frequency stabilized transmitter | 
        
          | US2609463A
              (en)
            
            * | 1948-10-26 | 1952-09-02 | Fauthal A Hassan | Electric actuating device | 
        
          | US2610270A
              (en)
            
            * | 1949-09-03 | 1952-09-09 | Curtiss R Schafer | Chopper | 
        
          | NL156649B
              (nl)
            
            * | 1949-10-20 |  | Keiji Taniuchi | Werkwijze voor het vormen van een uitscheurbaar gedeelte in een houderdeksel en houderdeksel, vervaardigd volgens de werkwijze. | 
        
          | US2684438A
              (en)
            
            * | 1950-08-15 | 1954-07-20 | Murray G Crosby | Relay feedback system | 
        
          | US2656458A
              (en)
            
            * | 1951-10-01 | 1953-10-20 | Joseph M Johnston | Compressional wave telemetering device | 
        
          | BE518358A
              (en:Method)
            
            * | 1952-03-12 |  |  |  | 
        
          | US2750565A
              (en)
            
            * | 1952-09-13 | 1956-06-12 | Raytheon Mfg Co | Altimeter modulators | 
        
          | US2741679A
              (en)
            
            * | 1952-11-12 | 1956-04-10 | Joseph F Keithley | Circuit interrupter | 
        
          | US2762922A
              (en)
            
            * | 1953-02-19 | 1956-09-11 | Pye Ltd | Automatic frequency control | 
        
          | US2752499A
              (en)
            
            * | 1953-11-02 | 1956-06-26 | Rca Corp | Ultrahigh frequency sweep generator | 
        
          | US2839684A
              (en)
            
            * | 1954-05-06 | 1958-06-17 | Cgs Lab Inc | Automatic frequency control | 
        
          | US3087124A
              (en)
            
            * | 1958-05-29 | 1963-04-23 | Raytheon Co | Feedback system for reed modulated magnetrons | 
        
          | US3096768A
              (en)
            
            * | 1960-05-27 | 1963-07-09 | Tron Inc Fa | Electrotherapy system |