Patents for H01F 21 - Variable inductances or transformers of the signal type (1,432)
08/1979
08/07/1979CA1060110A2 Saturable reactor for pincushion distortion correction
07/1979
07/31/1979US4163189 Transformer with a ferromagnetic core for d-c and a-c signals
05/1979
05/22/1979US4156223 Positional transducer utilizing magnetic elements
04/1979
04/17/1979US4150352 Precision transducer for position measurements
04/10/1979US4149133 Variable differential transformer apparatus
03/1979
03/20/1979CA1051104A1 Leakage reactance transformer
01/1979
01/09/1979CA1046144A1 Coil form
12/1978
12/12/1978US4129820 Variable reactance transformer
12/05/1978US4128818 Electrical frequency responsive structure
11/1978
11/28/1978US4127836 Tunable inductor coil
10/1978
10/31/1978CA1041621A1 Microelectronic variable inductor
09/1978
09/26/1978CA1039373A1 Saturable reactor for pincushion distortion correction
06/1978
06/20/1978US4096463 Inductive transducer
12/1977
12/20/1977US4064474 Impedance ratio varying device
12/13/1977US4063206 Tunable electrical component
11/1977
11/01/1977US4055886 Variable inductance transducer combined assembly and calibration method
09/1977
09/13/1977US4048597 Planar printed circuit board arrangement useful in the uhf portion of a television tuner
07/1977
07/12/1977US4035695 Microelectronic variable inductor
07/05/1977US4034325 Coarse and fine adjustment warp coil
06/1977
06/21/1977US4031496 Variable inductor
05/1977
05/17/1977US4024484 Variable inductance transducer
04/1977
04/26/1977US4020412 High-efficiency transfer of magnetic energy
02/1977
02/22/1977US4009460 Inductor
11/1976
11/02/1976US3990030 Pincushion correction transformer
10/1976
10/19/1976US3987386 Tunable air coil inductor
05/1976
05/18/1976US3958203 Positional transducer utilizing magnetic elements
05/18/1976US3958196 Coil tuning apparatus
04/1976
04/27/1976US3952603 Pushbutton system, in particular for a pushbutton operated car radio receiver
03/1976
03/16/1976US3944958 Adjusting pin for a ferro-magnetic core
03/16/1976US3944952 Fine tuning system having a limited user adjustable tuning range
02/1976
02/24/1976US3940662 Saturable reactor for pincushion distortion correction
02/17/1976US3939422 Dynamic antenna tuner
1 ... 5 6 7 8 9 10 11 12 13 14 15