US2147689A
(en )
1939-02-21
Method and apparatus for heating dielectric materials
US2523791A
(en )
1950-09-26
Automatic tuning system
US2018569A
(en )
1935-10-22
Radio signaling apparatus
US2239069A
(en )
1941-04-22
Ultra high frequency generator
US2026874A
(en )
1936-01-07
Keying circuit
US1945545A
(en )
1934-02-06
Frequency control system
US2517948A
(en )
1950-08-08
Oscillator control arrangement for dielectric heating systems
US1753408A
(en )
1930-04-08
Inductance system
US2438595A
(en )
1948-03-30
High-frequency generator
US2218309A
(en )
1940-10-15
Thermionic valve apparatus for use on very short wave lengths
US1986623A
(en )
1935-01-01
Signaling apparatus
US2545296A
(en )
1951-03-13
Constant frequency control for high-frequency heating apparatus
US2783347A
(en )
1957-02-26
High-frequency heating systems and applicators
US2160098A
(en )
1939-05-30
Fluid cooled elements for radio circuit
US1983380A
(en )
1934-12-04
High frequency amplifier
US2557310A
(en )
1951-06-19
Oscillator circuit
US2105568A
(en )
1938-01-18
Apparatus for diathermic treatment
US2508751A
(en )
1950-05-23
Oscillator circuit for high-frequency dielectric heating
US507458A
(en )
1893-10-24
Adjustable induction-coil
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(en )
1936-07-28
Crystal controlled circuit
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(en )
2005-04-28
Apparatus and process for generating electric power by utilizing high frequency high voltage oscillating current as a carrier for high EMF DC in an armature board
GB149018A
(en )
1920-08-12
Improved method of generating electric oscillations
SE73207C1
(en )