| Patents for H01F 19 - Fixed transformers or mutual inductances of the signal type (1,296) |
|---|
| 04/23/1991 | US5010314 Low-profile planar transformer for use in off-line switching power supplies |
| 04/23/1991 | CA1283464C Microwave transformer |
| 04/18/1991 | WO1991005355A1 High frequency matrix transformer power converter module |
| 04/17/1991 | EP0422397A1 Switch mode transformer |
| 04/10/1991 | EP0421514A1 Pulse transformer |
| 04/06/1991 | CA2026136A1 Pulse transformer |
| 03/27/1991 | EP0418538A1 Improvements in or relating to balun transformers |
| 03/20/1991 | EP0254727B1 Transformer, especially for a driver stage |
| 02/19/1991 | CA1280475C Transformer structure |
| 02/12/1991 | US4992769 Line transformer |
| 01/30/1991 | EP0410763A2 High frequency impedance transformer |
| 01/30/1991 | EP0410526A1 Generator for generating an electric voltage |
| 12/25/1990 | US4980654 Transmission line transformer |
| 12/18/1990 | US4978906 Picture frame matrix transformer |
| 12/18/1990 | CA1278051C Balanced planar transformers |
| 12/12/1990 | EP0370102A4 High frequency matrix transformer |
| 11/15/1990 | WO1990013939A1 Power conversion system |
| 11/08/1990 | DE3913558A1 Transformer with ferrite windings - has core with primary and secondary coils arranged on common sections in alternate manner |
| 09/25/1990 | US4959630 High-frequency transformer |
| 08/08/1990 | CN1009140B R.f. system for generating and/or receiving alternating magnetic fields |
| 07/31/1990 | US4945319 High frequency impedance transformer |
| 07/17/1990 | US4942353 High frequency matrix transformer power converter module |
| 06/20/1990 | EP0191806B1 Low profile magnetic structure in which one winding acts as support for second winding |
| 06/06/1990 | EP0371157A1 Network transformer |
| 05/31/1990 | DE3839771A1 Switching-network transformer having only one core |
| 05/30/1990 | EP0370102A1 High frequency matrix transformer |
| 05/22/1990 | US4927804 Thin-film transformer and magnetic head provided with such a transformer |
| 03/13/1990 | US4908585 RF transformer and diagnostic technique therefor |
| 02/28/1990 | EP0356109A2 Electronic inductor |
| 02/08/1990 | WO1990001232A1 Transformer having symmetrical push-pull windings |
| 01/30/1990 | CA1265217A1 Molded case circuit breaker current transformer with spiral bus |
| 01/23/1990 | US4896093 Electronic inductor |
| 01/17/1990 | EP0350767A1 Audio winding bridging an air gap |
| 12/21/1989 | DE3919569A1 Transformer |
| 12/05/1989 | US4885445 High-frequency transformer for microwave oven |
| 11/15/1989 | CN2047832U High-frequency transformer for high-frequency heating equipment |
| 11/02/1989 | WO1989010654A1 High frequency matrix transformer |
| 11/02/1989 | EP0339827A1 Flat voltage transformer |
| 10/24/1989 | CA1262479A1 Crt focus tracking arrangement |
| 10/05/1989 | DE3809341A1 Transformer for a switched-mode power supply |
| 10/04/1989 | EP0335142A1 Transformer for switching network |
| 09/27/1989 | EP0334520A1 Integrated inductor/capacitor device using soft ferrites |
| 09/26/1989 | CA1260089A1 Low profile magnetic structure in which one winding acts as support for second winding |
| 09/21/1989 | DE3807892A1 SMD radio-frequency transformer for wave soldering |
| 08/29/1989 | US4862189 Microwave transformer |
| 08/29/1989 | US4862129 Single-turn primary and single-turn secondary flat voltage transformer |
| 08/03/1989 | DE3900286A1 Transformer |
| 07/19/1989 | EP0324240A2 Balanced planar transformers |
| 07/18/1989 | US4847986 Method of making square toroid transformer for hybrid integrated circuit |
| 07/05/1989 | CN1033712A Miniature high frequency power transformer |
| 06/07/1989 | EP0318955A1 Miniature high frequency power transformer |
| 06/06/1989 | US4837659 Transformer/inductor with integrated capacitor using soft ferrites |
| 05/16/1989 | US4831661 RF tuning circuit |
| 04/25/1989 | US4825129 Video display apparatus |
| 03/28/1989 | US4817189 Directional high frequency broadband transformer made by printed circuit technique |
| 03/07/1989 | US4810899 High-voltage connection device, especially for a high-voltage transformer, without lead-out cables and with detachable potentiometer set |
| 02/28/1989 | US4809284 RF transformer and diagnostic technique therefor |
| 02/01/1989 | EP0301056A1 Microwave transformer. |
| 01/25/1989 | EP0300556A1 Thin-film transformer and magnetic head provided with such a transformer |
| 01/25/1989 | CN1030669A Thin-film transformer and magnetic head provided with such transformer |
| 01/24/1989 | US4800479 High frequency power converter having compact output transformer, rectifier and choke |
| 01/11/1989 | EP0298311A1 High-frequency transformer |
| 12/28/1988 | CN88104618A Unbalanced complete cut-off network |
| 12/07/1988 | EP0293617A1 High-frequency power transmitter |
| 11/15/1988 | US4785345 Integrated transformer structure with primary winding in substrate |
| 11/15/1988 | US4785273 Strip-line-core transformer |
| 10/19/1988 | EP0286980A1 High-voltage transformer |
| 10/11/1988 | US4777465 Square toroid transformer for hybrid integrated circuit |
| 10/05/1988 | EP0187771B1 High frequency transformer |
| 08/25/1988 | WO1988006343A1 Microwave transformer |
| 08/24/1988 | EP0279538A1 Transformer with wire lead isolation slots |
| 07/26/1988 | US4760325 High frequency coil arrangement |
| 07/12/1988 | US4757295 Transmission line pulsed transformer |
| 06/14/1988 | US4751717 RF transformer and diagnostic technique therefor |
| 06/01/1988 | EP0268671A1 Transformer structure |
| 05/18/1988 | CN85104371B Peak transform |
| 05/17/1988 | US4745388 Transformer with wire lead isolation slots |
| 04/06/1988 | CN87211687U Flyback transformer with inductance element |
| 03/16/1988 | CN86207264U Energy-sav9ng power supply for neon tube lamp |
| 03/01/1988 | US4728894 High frequency coil for an NMR apparatus |
| 02/03/1988 | EP0254727A1 Transformer, especially for a driver stage. |
| 01/26/1988 | CA1232041A1 Transformer comprising coaxial coil formers |
| 01/12/1988 | US4719530 Lightning protection system for a remote control circuit utilizing an isolation transformer |
| 12/22/1987 | CA1230652A1 Power transformer for use with very high speed integrated circuits |
| 11/19/1987 | WO1987007074A1 Transformer structure |
| 09/16/1987 | EP0236642A1 High-voltage connection device, particularly for a high-voltage transformer |
| 07/21/1987 | US4682114 Power modulator provided with a transformer |
| 07/16/1987 | WO1987004297A1 Magnetic driver stage and transformer, especially for the driver stage |
| 07/09/1987 | DE3546377A1 Magnetic driver stage, especially for a power switching transistor, and a transformer for the driver stage |
| 07/02/1987 | DE3546410A1 Transformer |
| 06/18/1987 | WO1987003737A1 High-voltage connection device, particularly for high voltage transformer |
| 05/20/1987 | EP0222687A2 Current transformer for a protective switch |
| 05/12/1987 | US4665357 Flat matrix transformer |
| 04/22/1987 | EP0218846A1 High-frequency wide band transformer circuit |
| 03/26/1987 | DE3534006A1 Pulse transformer |
| 02/04/1987 | EP0146585B1 Inductive element, particularly transformer |
| 01/17/1987 | CN85101788A R.f. coil system for generating and/or receiving alternating magnetic fields |
| 12/23/1986 | US4631504 Impedance conversion transformer |
| 12/16/1986 | US4630018 Molded case circuit breaker current transformer with spiral bus |
| 12/03/1986 | CN85104371A Peak transformer |