| GB523712A
              (en)
            
            * | 1937-10-11 | 1940-07-22 | Univ Leland Stanford Junior | An improved electrical discharge system and method of operating the same | 
        
          | US2616038A
              (en)
            
            * | 1947-09-23 | 1952-10-28 | Univ Leland Stanford Junior | Frequency converter | 
        
          | USRE22724E
              (en)
            
            * | 1938-04-14 | 1946-02-19 |  | Radio transmission and reception | 
        
          | US2466754A
              (en)
            
            * | 1938-06-18 | 1949-04-12 | Univ Leland Stanford Junior | Frequency multiplier | 
        
          | US2468928A
              (en)
            
            * | 1938-07-08 | 1949-05-03 | Univ Leland Stanford Junior | Electronic oscillator-detector | 
        
          | US2458223A
              (en)
            
            * | 1939-07-03 | 1949-01-04 | Albert G Thomas | Electronic tube | 
        
          | NL80761C
              (en0)
            
            * | 1939-08-24 |  |  |  | 
        
          | DE748907C
              (de)
            
            * | 1939-11-18 | 1945-01-19 |  | Mit Geschwindigkeitssteuerung arbeitende Entladungsanordnung fuer ultrakurze Wellen | 
        
          | DE970149C
              (de)
            
            * | 1940-05-17 | 1958-08-21 | Western Electric Co | Elektronenentladungs-Vorrichtung zur Verstaerkung einer hochfrequenten elektromagnetischen Welle | 
        
          | US2490030A
              (en)
            
            * | 1940-06-28 | 1949-12-06 | Sperry Corp | High-frequency tube structure | 
        
          | US2610307A
              (en)
            
            * | 1940-07-02 | 1952-09-09 | Univ Leland Stanford Junior | Tunable cavity resonator electron discharge device | 
        
          | US2424959A
              (en)
            
            * | 1940-09-21 | 1947-08-05 | Standard Telephones Cables Ltd | Tube arrangement for frequency doubling | 
        
          | DE967231C
              (de)
            
            * | 1940-10-22 | 1957-10-24 | Pintsch Bamag Ag | Einrichtung zum Anfachen (Erzeugen, Verstaerken oder Empfangen) ultrakurzer elektrischer Wellen, insbesondere des Dezimeter- oder Zentimeterwellengebietes | 
        
          | US2424002A
              (en)
            
            * | 1940-11-04 | 1947-07-15 | Research Corp | High-frequency electronic tube | 
        
          | FR972003A
              (fr)
            
            * | 1940-12-18 | 1951-01-24 | Csf | Perfectionnements aux tubes électroniques à modulation de vitesse | 
        
          | US2520182A
              (en)
            
            * | 1940-12-24 | 1950-08-29 | Int Standard Electric Corp | Electron discharge apparatus | 
        
          | US2416302A
              (en)
            
            * | 1941-01-07 | 1947-02-25 | Bell Telephone Labor Inc | Electronic apparatus | 
        
          | US2490622A
              (en)
            
            * | 1941-01-15 | 1949-12-06 | Emi Ltd | High-frequency transmission line or cable and connector therefor | 
        
          | DE976503C
              (de)
            
            * | 1941-03-25 | 1963-12-05 | Siemens Ag | Verfahren zum Betrieb einer Elektronenroehre mit Laufzeitsteuerung | 
        
          | DE976519C
              (de)
            
            * | 1941-03-25 | 1963-10-17 | Siemens Ag | Klystron | 
        
          | US2458556A
              (en)
            
            * | 1941-04-08 | 1949-01-11 | Bell Telephone Labor Inc | Coupled cavity resonator and wave guide apparatus | 
        
          | US2450893A
              (en)
            
            * | 1941-05-17 | 1948-10-12 | Sperry Corp | High-frequency tube structure | 
        
          | GB640896A
              (en)
            
            * | 1941-10-23 | 1950-08-02 | Sperry Corp | Improvements in or relating to electron discharge apparatus adapted for frequency multiplication | 
        
          | GB640899A
              (en)
            
            * | 1941-10-23 | 1950-08-02 | Sperry Corp | Improvements in or relating to frequency multiplier electron discharge apparatus | 
        
          | US2425738A
              (en)
            
            * | 1941-10-23 | 1947-08-19 | Sperry Gyroscope Co Inc | Tunable high-frequency electron tube structure | 
        
          | US2506590A
              (en)
            
            * | 1941-10-31 | 1950-05-09 | Sperry Corp | High-frequency tube structure | 
        
          | NL66484C
              (en0)
            
            * | 1941-11-22 |  |  |  | 
        
          | FR888587A
              (fr)
            
            * | 1941-11-27 | 1943-12-16 | Philips Nv | Dispositif destiné à produire des oscillations | 
        
          | GB581895A
              (en)
            
            * | 1941-12-16 | 1946-10-29 | Albert Frederick Pearce | Improvements in or relating to electron discharge devices employing hollow resonators | 
        
          | DE969845C
              (de)
            
            * | 1941-12-18 | 1958-07-24 | Pintsch Bamag Ag | Elektronenroehrenanordnung zum Anfachen (Erzeugen, Verstaerken oder Empfangen) ultrakurzer elektrischer Wellen | 
        
          | GB622655A
              (en)
            
            * | 1941-12-22 | 1949-05-05 | Sperry Gyroscope Co Inc | Improvements in or relating to high frequency electron discharge apparatus | 
        
          | US2581404A
              (en)
            
            * | 1942-01-29 | 1952-01-08 | Sperry Corp | High-frequency modulator apparatus | 
        
          | US2531455A
              (en)
            
            * | 1942-02-04 | 1950-11-28 | Sperry Corp | Directive antenna structure | 
        
          | FR880640A
              (fr)
            
            * | 1942-02-06 | 1943-03-31 | Philips Nv | Dispositif générateur, modulateur ou amplificateur d'oscillations électriques | 
        
          | US2424965A
              (en)
            
            * | 1942-03-20 | 1947-08-05 | Standard Telephones Cables Ltd | High-frequency amplifier and oscillator | 
        
          | US2462856A
              (en)
            
            * | 1942-05-19 | 1949-03-01 | Sperry Corp | Transmitter and/or receiver circuits | 
        
          | CH238068A
              (fr)
            
            * | 1942-06-11 | 1945-06-15 | Radio Electr Soc Fr | Emetteur à ondes décimétriques modulées en fréquence. | 
        
          | US2436833A
              (en)
            
            * | 1942-06-15 | 1948-03-02 | Int Standard Electric Corp | High density beam tube | 
        
          | US2482766A
              (en)
            
            * | 1942-07-01 | 1949-09-27 | Sperry Corp | High-frequency modulating system | 
        
          | US2507972A
              (en)
            
            * | 1942-07-25 | 1950-05-16 | Rca Corp | Electron discharge device and associated circuits | 
        
          | US2493046A
              (en)
            
            * | 1942-08-03 | 1950-01-03 | Sperry Corp | High-frequency electroexpansive tuning apparatus | 
        
          | US2436397A
              (en)
            
            * | 1942-08-08 | 1948-02-24 | Bell Telephone Labor Inc | Ultra high frequency oscillator | 
        
          | US2574012A
              (en)
            
            * | 1942-09-15 | 1951-11-06 | Csf | Electron discharge tube and circuit arrangement therefor | 
        
          | US2455269A
              (en)
            
            * | 1942-11-17 | 1948-11-30 | Bell Telephone Labor Inc | Velocity variation apparatus | 
        
          | GB586275A
              (en)
            
            * | 1942-12-04 | 1947-03-13 | Standard Telephones Cables Ltd | Improvements in or relating to ultra high frequency electric oscillators | 
        
          | US2435601A
              (en)
            
            * | 1942-12-31 | 1948-02-10 | Gen Electric | Phase modulation system | 
        
          | US2514428A
              (en)
            
            * | 1943-01-06 | 1950-07-11 | Sperry Corp | Electronic apparatus of the cavity resonator type | 
        
          | US2487800A
              (en)
            
            * | 1943-01-22 | 1949-11-15 | Sperry Corp | Frequency multiplier and stabilization cavity resonator apparatus | 
        
          | US2468152A
              (en)
            
            * | 1943-02-09 | 1949-04-26 | Sperry Corp | Ultra high frequency apparatus of the cavity resonator type | 
        
          | US2416714A
              (en)
            
            * | 1943-02-22 | 1947-03-04 | Bell Telephone Labor Inc | Electron discharge device | 
        
          | US2460498A
              (en)
            
            * | 1943-03-15 | 1949-02-01 | Sperry Corp | Modulation control apparatus | 
        
          | US2451813A
              (en)
            
            * | 1943-03-30 | 1948-10-19 | Westinghouse Electric Corp | Electron discharge device having an electron beam passage and aligning means therewith for the cathode | 
        
          | NL73984C
              (en0)
            
            * | 1943-04-06 |  |  |  | 
        
          | US2462087A
              (en)
            
            * | 1943-04-19 | 1949-02-22 | Int Standard Electric Corp | Electron discharge device of the velocity modulation type | 
        
          | US2435609A
              (en)
            
            * | 1943-04-20 | 1948-02-10 | Bell Telephone Labor Inc | Dipole antenna | 
        
          | USRE23277E
              (en)
            
            * | 1943-04-26 | 1950-10-03 |  | High-frequency resonator tube | 
        
          | US2464349A
              (en)
            
            * | 1943-05-27 | 1949-03-15 | Bell Telephone Labor Inc | Electronic high-voltage generator discharge device | 
        
          | US2426193A
              (en)
            
            * | 1943-06-17 | 1947-08-26 | Rca Corp | Radio transmitter automatic volume control | 
        
          | US2429401A
              (en)
            
            * | 1943-06-18 | 1947-10-21 | Arthur C Davis | Coaxial cable device | 
        
          | US2647220A
              (en)
            
            * | 1943-06-25 | 1953-07-28 | Emi Ltd | Electron tube structure for the production of annular beams of electrons | 
        
          | US2466064A
              (en)
            
            * | 1943-06-28 | 1949-04-05 | Sperry Corp | Velocity modulation apparatus | 
        
          | US2496901A
              (en)
            
            * | 1943-07-06 | 1950-02-07 | Hartford Nat Bank & Trust Co | Method and composition for coating cathode-ray tubes | 
        
          | US2470802A
              (en)
            
            * | 1943-08-10 | 1949-05-24 | Rca Corp | Microwave device | 
        
          | US2437067A
              (en)
            
            * | 1943-11-17 | 1948-03-02 | Philco Corp | Adjusting means for transmission lines | 
        
          | DE967232C
              (de)
            
            * | 1943-11-20 | 1957-11-21 | Lorenz C Ag | Mischanordnung unter Verwendung einer geschwindigkeits- oder dichtegesteuerten Laufzeitroehre | 
        
          | US2454094A
              (en)
            
            * | 1944-01-21 | 1948-11-16 | Scophony Corp Of America | Electron discharge device for producing electric oscillations | 
        
          | GB588247A
              (en)
            
            * | 1944-03-28 | 1947-05-19 | Standard Telephones Cables Ltd | Improvements in or relating to electron velocity modulation devices | 
        
          | US2504329A
              (en)
            
            * | 1944-04-05 | 1950-04-18 | Bell Telephone Labor Inc | Oscillation damping device | 
        
          | US2451201A
              (en)
            
            * | 1944-04-15 | 1948-10-12 | Gen Electric | Attenuator for ultra high frequencies | 
        
          | US2438768A
              (en)
            
            * | 1944-04-28 | 1948-03-30 | Philco Corp | Apparatus for varying the frequency of resonant cavities | 
        
          | US2435984A
              (en)
            
            * | 1944-06-02 | 1948-02-17 | Raytheon Mfg Co | Tunable magnetron | 
        
          | DE970799C
              (de)
            
            * | 1944-07-14 | 1958-10-30 | Siemens Ag | Hohlraumresonatoranordnung fuer die Benutzung in Laufzeitroehren | 
        
          | US2452056A
              (en)
            
            * | 1944-07-20 | 1948-10-26 | Raytheon Mfg Co | Electrical discharge device | 
        
          | US2508695A
              (en)
            
            * | 1944-07-29 | 1950-05-23 | Rca Corp | Cavity resonator electron discharge apparatus | 
        
          | US2446260A
              (en)
            
            * | 1944-07-31 | 1948-08-03 | Farnsworth Res Corp | Differentiating discharge tube | 
        
          | US2456466A
              (en)
            
            * | 1944-09-20 | 1948-12-14 | Phiilco Corp | Variable time delay electronic apparatus | 
        
          | US2444303A
              (en)
            
            * | 1944-10-21 | 1948-06-29 | Sylvania Electric Prod | Ultra high frequency electronic tube | 
        
          | US2452272A
              (en)
            
            * | 1944-10-28 | 1948-10-26 | Philco Corp | Magnetron | 
        
          | US2695373A
              (en)
            
            * | 1944-11-16 | 1954-11-23 | Rca Corp | Cavity resonator high-frequency apparatus | 
        
          | US2421725A
              (en)
            
            * | 1944-11-23 | 1947-06-03 | Philco Corp | Variable frequency cavity resonator oscillator | 
        
          | US2482769A
              (en)
            
            * | 1944-12-28 | 1949-09-27 | Sperry Corp | High-frequency apparatus | 
        
          | US2629821A
              (en)
            
            * | 1945-06-07 | 1953-02-24 | La Verne R Philpott | High-frequency signal translation circuit | 
        
          | BE470150A
              (en0)
            
            * | 1945-07-02 |  |  |  | 
        
          | US2479220A
              (en)
            
            * | 1945-08-01 | 1949-08-16 | Harold C Early | Wave guide | 
        
          | US2637781A
              (en)
            
            * | 1945-09-14 | 1953-05-05 | Us Navy | Series reactance transformer | 
        
          | US2617962A
              (en)
            
            * | 1945-10-19 | 1952-11-11 | Jack W Keuffel | Velocity modulation tube | 
        
          | US2508645A
              (en)
            
            * | 1945-10-23 | 1950-05-23 | Rca Corp | Frequency changer | 
        
          | GB628806A
              (en)
            
            * | 1945-11-14 | 1949-09-06 | Gen Electric Co Ltd | Improvements in apparatus for accelerating charged particles, especially electrons, to very high velocity | 
        
          | US2666165A
              (en)
            
            * | 1946-01-03 | 1954-01-12 | Hutchinson Franklin | Tunable magnetron oscillator | 
        
          | NL72891C
              (en0)
            
            * | 1946-01-31 |  |  |  | 
        
          | US2658147A
              (en)
            
            * | 1946-02-18 | 1953-11-03 | Kenneth T Bainbridge | Tunable velocity modulation device | 
        
          | US2606291A
              (en)
            
            * | 1946-03-11 | 1952-08-05 | Robert R Wilson | Method and apparatus for material separation | 
        
          | US2510026A
              (en)
            
            * | 1946-04-05 | 1950-05-30 | Rca Corp | Frequency modulation system for microwave generators | 
        
          | US2521545A
              (en)
            
            * | 1946-06-28 | 1950-09-05 | Bell Telephone Labor Inc | Electron discharge device | 
        
          | US2645738A
              (en)
            
            * | 1946-08-14 | 1953-07-14 | Hartford Nat Bank & Trust Co | Circuit arrangement comprising a reflex discharge tube | 
        
          | US2554134A
              (en)
            
            * | 1946-10-01 | 1951-05-22 | Winfield G Wagener | Electron tube for ultra high frequency | 
        
          | NL135247C
              (en0)
            
            * | 1946-10-22 |  |  |  | 
        
          | NL73832C
              (en0)
            
            * | 1946-10-22 |  |  |  | 
        
          | US2562927A
              (en)
            
            * | 1946-12-28 | 1951-08-07 | Sperry Corp | Ultra high frequency discharge tube | 
        
          | GB650032A
              (en)
            
            * | 1947-03-20 | 1951-02-14 | Standard Telephones Cables Ltd | Improvements in or relating to electric signal storage or demodulating circuits | 
        
          | FR963882A
              (en0)
            
            * | 1947-04-03 | 1950-07-24 |  |  | 
        
          | US2579480A
              (en)
            
            * | 1947-08-26 | 1951-12-25 | Sperry Corp | Ultrahigh-frequency electron discharge apparatus | 
        
          | US2523750A
              (en)
            
            * | 1947-10-01 | 1950-09-26 | Gen Electric | Electric discharge device construction | 
        
          | US2601539A
              (en)
            
            * | 1947-11-29 | 1952-06-24 | Westinghouse Electric Corp | Two-frequency microwave oscillator | 
        
          | US2667597A
              (en)
            
            * | 1948-06-14 | 1954-01-26 | Int Standard Electric Corp | Velocity modulated electron discharge device | 
        
          | US2733305A
              (en)
            
            * | 1948-09-30 | 1956-01-31 |  | Diemer | 
        
          | US2581612A
              (en)
            
            * | 1948-10-20 | 1952-01-08 | Rca Corp | Electron discharge device of the beam deflection type | 
        
          | US2653271A
              (en)
            
            * | 1949-02-05 | 1953-09-22 | Sperry Corp | High-frequency apparatus | 
        
          | US2691118A
              (en)
            
            * | 1950-01-23 | 1954-10-05 | Collins Radio Co | Extremely high-frequency electronic device | 
        
          | US2573287A
              (en)
            
            * | 1950-06-23 | 1951-10-30 | Rauland Corp | Electron gun for cathode-ray tubes | 
        
          | US2762916A
              (en)
            
            * | 1950-07-13 | 1956-09-11 | Hartford Nat Bank & Trust Co | Device comprising an electric discharge tube having a concentrated electron beam | 
        
          | US2760103A
              (en)
            
            * | 1950-12-22 | 1956-08-21 | Collins Radio Co | Multiple mode excitation apparatus | 
        
          | US2652512A
              (en)
            
            * | 1950-12-22 | 1953-09-15 | Bell Telephone Labor Inc | Electron gun | 
        
          | BE510250A
              (en0)
            
            * | 1951-04-13 |  |  |  | 
        
          | US2800602A
              (en)
            
            * | 1951-06-05 | 1957-07-23 | Univ Leland Stanford Junior | Low noise electron discharge tubes | 
        
          | BE513715A
              (en0)
            
            * | 1951-08-25 |  |  |  | 
        
          | US2800606A
              (en)
            
            * | 1951-10-26 | 1957-07-23 | Univ Leland Stanford Junior | Space charge wave amplifiers | 
        
          | BE516737A
              (en0)
            
            * | 1952-01-04 |  |  |  | 
        
          | US2849602A
              (en)
            
            * | 1952-03-01 | 1958-08-26 | Du Mont Allen B Lab Inc | Heterodyne circuit | 
        
          | BE519545A
              (en0)
            
            * | 1952-05-01 |  |  |  | 
        
          | US2774044A
              (en)
            
            * | 1952-08-09 | 1956-12-11 | Itt | Tunable coaxial line | 
        
          | US2768318A
              (en)
            
            * | 1952-10-03 | 1956-10-23 | Philco Corp | Screen structure for cathode ray tubes | 
        
          | US2737623A
              (en)
            
            * | 1952-10-16 | 1956-03-06 | Csf | High voltage electrostatic machines | 
        
          | US2843788A
              (en)
            
            * | 1952-12-03 | 1958-07-15 | Rolf W Peter | Electron beam tube | 
        
          | US2741718A
              (en)
            
            * | 1953-03-10 | 1956-04-10 | Sperry Rand Corp | High frequency apparatus | 
        
          | US2857480A
              (en)
            
            * | 1953-03-27 | 1958-10-21 | Gen Electric | Space charge grid electron beam amplifier with dual outputs | 
        
          | US2822473A
              (en)
            
            * | 1953-07-27 | 1958-02-04 | William R Aiken | Pulse duration lengthener | 
        
          | US2853647A
              (en)
            
            * | 1954-03-24 | 1958-09-23 | Litton Industries Inc | Tunable cavity resonator electron discharge device | 
        
          | US2808470A
              (en)
            
            * | 1954-05-18 | 1957-10-01 | Rca Corp | Electron discharge device structures and circuitry therefor | 
        
          | DE1059565B
              (de)
            
            * | 1955-01-15 | 1959-06-18 | Sebel S A | Elektronische Lampe fuer Beleuchtungszwecke | 
        
          | US2860279A
              (en)
            
            * | 1955-04-18 | 1958-11-11 | Ross E Hester | High current linear ion accelerator | 
        
          | LU34990A1
              (en0)
            
            * | 1956-03-16 |  |  |  | 
        
          | US2864965A
              (en)
            
            * | 1956-04-05 | 1958-12-16 | Sperry Rand Corp | Electron gun for tubular beam | 
        
          | CA617300A
              (en)
            
            * | 1956-12-26 | 1961-03-28 | Wargo Peter | Long-life rugged storage structure for electronic tubes | 
        
          | BE570553A
              (en0)
            
            * | 1957-08-22 |  |  |  | 
        
          | NL232220A
              (en0)
            
            * | 1957-11-25 |  |  |  | 
        
          | US3011086A
              (en)
            
            * | 1957-11-29 | 1961-11-28 | Applied Radiation Corp | Means for selecting electron beam energy | 
        
          | US3080523A
              (en)
            
            * | 1958-04-07 | 1963-03-05 | Westinghouse Electric Corp | Electronically-controlled-scanning directional antenna apparatus utilizing velocity modulation of a traveling wave tube | 
        
          | US3012170A
              (en)
            
            * | 1958-08-29 | 1961-12-05 | Eitel Mccullough Inc | Charged particle beam modulating means and method | 
        
          | US2957983A
              (en)
            
            * | 1958-09-12 | 1960-10-25 | Sylvania Electric Prod | Traveling wave tube demodulator | 
        
          | US3227581A
              (en)
            
            * | 1960-02-23 | 1966-01-04 | Eitel Mccullough Inc | Process for rendering ceramics slightly conductive | 
        
          | US3178653A
              (en)
            
            * | 1960-04-04 | 1965-04-13 | Raytheon Co | Cavity resonator with beamconcentric ring electrode | 
        
          | US3172004A
              (en)
            
            * | 1960-06-17 | 1965-03-02 | Sperry Rand Corp | Depressed collector operation of electron beam device | 
        
          | US3383596A
              (en)
            
            * | 1965-06-28 | 1968-05-14 | Raytheon Co | Microwave energy transmission and commutation coupler | 
        
          | US4051405A
              (en)
            
            * | 1975-09-10 | 1977-09-27 | The United States Of America As Represented By The Secretary Of The Army | Method for controlling low-energy high current density electron beams | 
        
          | US4350926A
              (en)
            
            * | 1980-07-28 | 1982-09-21 | The United States Of America As Represented By The Secretary Of The Army | Hollow beam electron source | 
        
          | NL8400841A
              (nl)
            
            * | 1984-03-16 | 1985-10-16 | Philips Nv | Kathodestraalbuis. | 
        
          | US5525864A
              (en)
            
            * | 1994-02-07 | 1996-06-11 | Hughes Aircraft Company | RF source including slow wave tube with lateral outlet ports | 
        
          | US5493877A
              (en) | 1994-10-05 | 1996-02-27 | Wickremasinghe; Daniel R. | Water level sensor and alarm system | 
        
          | US6182871B1
              (en)
            
            * | 1995-01-19 | 2001-02-06 | Peter Ar-Fu Lam | Personalized garment coordination apparatus | 
        
          | CN102657570A
              (zh)
            
            * | 2012-03-25 | 2012-09-12 | 仲伟锋 | 一种自携式热敷减轻咽喉肿痛装置 |