FR1006324A
(en )
1952-04-22
Elastic wave probe
FR993329A
(en )
1951-10-30
Measuring devices
FR978221A
(en )
1951-04-11
Gas loss measurement equipment
AT169287B
(en )
1951-10-25
Adjustable device for measuring the frequency of electrical vibrations
FR944399A
(en )
1949-04-04
Device for generating low frequency electrical oscillations
FR924746A
(en )
1947-08-13
Recorder measuring device
SU76441A2
(en )
1948-11-30
Instrument for measuring the speed of telegraph work
FR58255E
(en )
1953-11-18
Electrical measuring devices
FR968478A
(en )
1950-11-28
Measuring device
CH266498A
(en )
1950-01-31
Device for generating electrical oscillations of high frequency.
FR1022305A
(en )
1953-03-03
Frequency measuring devices
FR1004312A
(en )
1952-03-28
Improvements to high frequency measuring generators
FR932224A
(en )
1948-03-16
Electric frequency meter
FR951176A
(en )
1949-10-18
measuring instrument case
FR951922A
(en )
1949-11-07
Electric field measuring devices
FR952269A
(en )
1949-11-14
Improvements to electrical measuring devices
FR58154E
(en )
1953-09-29
Electrical measuring devices
FR941061A
(en )
1948-12-31
Frequency meter
FR983034A
(en )
1951-06-18
Device for measuring small alternating variations of electrical constants
FR1004520A
(en )
1952-03-31
Generator-receiver assembly for variable frequency electrical measurements
ES175021A1
(en )
1946-11-01
SILICON DETECTOR FOR ELECTRICAL OSCILLATIONS
AT170549B
(en )
1952-02-25
High frequency vibration generator
FR979814A
(en )
1951-05-04
Amplifier for measuring electrical charges
FR933727A
(en )
1948-04-29
Apparatus for measuring electrical impedances
FR972199A
(en )
1951-01-26
Wattmeter for high frequency electric currents