GB504802A
(en )
1939-05-01
Improvements in or relating to permanent magnet devices for producing axially symmetrical magnetic fields
CN219247678U
(zh )
2023-06-23
磁圈并联型非线性项抵消的动圈式振子
US2962636A
(en )
1960-11-29
Magnetic filter
CN219204661U
(zh )
2023-06-16
磁圈并联型非线性项抵消的动磁式振子
US4845424A
(en )
1989-07-04
Rotary displacement motor
GB700965A
(enrdf_load_stackoverflow )
1900-01-01
GB212648A
(en )
1924-03-14
Improvements in sound emitting apparatus, such as telephone receivers
US1022795A
(en )
1912-04-09
Electrical measuring instrument.
US2051475A
(en )
1936-08-18
Relay
US4449094A
(en )
1984-05-15
Temperature compensated magnetic damping assembly for induction meters
US2866138A
(en )
1958-12-23
Instrument moving-coil assemblies
US2735045A
(en )
1956-02-14
Savoie
US2508410A
(en )
1950-05-23
Moving coil measuring instrument
US1181270A
(en )
1916-05-02
Electrical measuring instrument.
US2275868A
(en )
1942-03-10
Current responsive device
US964714A
(en )
1910-07-19
Alternating-current motor.
US1100188A
(en )
1914-06-16
Electromagnetic device.
GB191417317A
(en )
1915-07-21
Improvements in and relating to Electrical Measuring Instruments.
GB744647A
(en )
1956-02-08
Improvements in or relating to magnetic electron lenses and pole pieces for use therein
GB549746A
(en )
1942-12-04
Improvements in and relating to electric meters
SU36480A1
(ru )
1934-05-31
Электромагнитный громкоговоритель
GB328846A
(en )
1930-05-08
Improvements in magnetos
GB190126377A
(en )
1902-01-30
Improvements in Induction Electric Meters.
US1401112A
(en )
1921-12-20
Dynamo-electric machine
US730698A
(en )
1903-06-09
Electrical measuring instrument.