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
GB486695A
(enExample )
1900-01-01
US1022795A
(en )
1912-04-09
Electrical measuring instrument.
US20230246529A1
(en )
2023-08-03
Consequent pole-type interior permanent magnet synchronous motor
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
US3593135A
(en )
1971-07-13
Ring core meter movement
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.
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
GB190126377A
(en )
1902-01-30
Improvements in Induction Electric Meters.
US1401112A
(en )
1921-12-20
Dynamo-electric machine
US1780349A
(en )
1930-11-04
Apparatus for radiating sound waves
US730698A
(en )
1903-06-09
Electrical measuring instrument.
GB563442A
(enExample )
US1661829A
(en )
1928-03-06
Dynamo-electrical vibrating unit