US1927346A
(en )
1933-09-19
Electromagnetic device
US2422714A
(en )
1947-06-24
Miniature electric meter
GB994365A
(https= )
JP2717494B2
(ja )
1998-02-18
回転磁気ヘッド装置
JP2866299B2
(ja )
1999-03-08
張力調整装置
KR920005797B1
(ko )
1992-07-18
전자광학장치
US2446579A
(en )
1948-08-10
Polarized armature current ratiometer
GB929582A
(https= )
US3005951A
(en )
1961-10-24
Wide scale electrical measuring instrument
US3275936A
(en )
1966-09-27
Electric meter including pivoted mag-
net rotor surrounded by continuous
pole faces
GB951458A
(https= )
GB456988A
(https= )
US2465053A
(en )
1949-03-22
Eccentric moving coil electrical
US2333991A
(en )
1943-11-09
Electrical measuring instrument
US4710706A
(en )
1987-12-01
Electrical measuring meter and method including a calibrating element
GB597243A
(https= )
US3040253A
(en )
1962-06-19
Dual magnet electrical instrument
US2871449A
(en )
1959-01-27
Magnetic restoring force suspension galvanometer
GB940680A
(https= )
US2834942A
(en )
1958-05-13
Magnetized core measuring instrument
US3119962A
(en )
1964-01-28
lender etal
GB969047A
(https= )
GB891137A
(https= )
GB769796A
(https= )
GB563442A
(https= )