FR1205483A
(en )
1960-02-03
Improvements in photoelectric exploration devices
FR1222650A
(en )
1960-06-10
Improvements in recording exploration devices
FR1213897A
(en )
1960-04-05
Magnetic field generator device
BE580218A
(en )
1959-10-16
Device for the exploration of geological formations
FR1312114A
(en )
1962-12-14
Magnetic flowmeter
FR74307E
(en )
1960-11-07
Magnetic device
FR1209339A
(en )
1960-03-01
Magnetic device
FI34719A
(en )
1964-12-10
Geophysical measuring device for measuring the magnetic field in boreholes
FI34617A
(en )
1964-11-10
Apparatus for measuring very weak magnetic fields, and in particular the earth's magnetic field, in particular for mineral exploration
FR1201076A
(en )
1959-12-28
Magnetic recording device
CH375545A
(en )
1964-02-29
Electromagnetic measuring device
FR1150345A
(en )
1958-01-10
Further training in the use of radioactivity prospecting devices
FR1232798A
(en )
1960-10-12
Magnetic amplifier circuit
FR1217107A
(en )
1960-05-02
Magnetic storage device
FR1189084A
(en )
1959-09-29
Magnetic device
FR76869E
(en )
1961-12-15
Improvements in photoelectric exploration devices
FR74451E
(en )
1960-12-19
Improvements in photoelectric exploration devices
FR1299901A
(en )
1962-07-27
Magnetic storage device
BE574790A
(en )
1959-07-16
Ferromagnetic nuclei
FR1251650A
(en )
1961-04-21
Exploration device
FI29486A
(en )
1958-01-10
Magnetic torque meter
CH410061A
(en )
1966-03-31
Magnetic recording device
FI33369A
(en )
1963-07-10
Device in a magnetometer
FI34045A
(en )
1964-03-10
Geophysical prospecting method and device
FI35442A
(en )
1965-11-10
Method and apparatus for measuring very weak magnetic fields, in particular the earth's magnetic field, in particular for mineral exploration