US3746975A
(en )
1973-07-17
Measuring characteristics of materials by using susceptive and conductive components of admittance
US3347223A
(en )
1967-10-17
Pneumograph
US4174498A
(en )
1979-11-13
Apparatus and method for providing separate conductivity, dielectric coefficient, and moisture measurements of particulate material
US3646434A
(en )
1972-02-29
Standardization of dielectric materials gauges having capacitive probes with remotely controlled balancing circuits using varactors
US2309481A
(en )
1943-01-26
Frequency monitoring system
US2807720A
(en )
1957-09-24
Regulated oscillator
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1951-06-05
Moisture content monitor
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(en )
1983-04-26
Microwave test apparatus and method
GB911975A
(enrdf_load_stackoverflow )
US3012197A
(en )
1961-12-05
Calibration apparatus
US2274184A
(en )
1942-02-24
Phase and frequency variation response circuit
US2948850A
(en )
1960-08-09
Apparatus for analyzing weight composition of materials
US3290588A
(en )
1966-12-06
Dielectric measuring system including phase inverting means
US3323049A
(en )
1967-05-30
System for quantitatively measuring a property of dielectric material by applying input signals at two different frequencies to a capacitance probe and varying the frequency of one input signal to maintain a constant ratio of output signals for the two frequencies
US2721977A
(en )
1955-10-25
Variable amplitude oscillator
US3531722A
(en )
1970-09-29
Frequency monitoring system employing a local oscillator and fixed-tuned monitor
US3443219A
(en )
1969-05-06
Dielectric materials gauging system with input signal frequency automatically variable in response to detected signal phase shift variation
US2478023A
(en )
1949-08-02
Frequency monitoring system
US2520621A
(en )
1950-08-29
Frequency discriminator
US2173231A
(en )
1939-09-19
Measuring instrument
US2525780A
(en )
1950-10-17
Electrical frequency discriminator circuit
US2685648A
(en )
1954-08-03
Apparatus for measuring frequency deviation
GB591172A
(en )
1947-08-08
Improvements relating to the electrical measurement or variation of physical states of materials such as moisture contents thereof
US2617938A
(en )
1952-11-11
Testing apparatus for radio communication systems
GB1192749A
(en )
1970-05-20
Method and Apparatus for Measuring a Property of a Dielectric Material