Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7750782 | Nine-phase autotransformer | — | 2010-07-06 |
| 7719858 | Fifteen-phase autotransformer | — | 2010-05-18 |
| 7274280 | Nine-phase step-up/step-down autotransformer | — | 2007-09-25 |
| 7233506 | Low kVA/kW transformers for AC to DC multipulse converters | — | 2007-06-19 |
| 6982884 | Autotransformers to parallel AC to DC converters | — | 2006-01-03 |
| 6525951 | Simplified wye connected 3-phase to 9-phase auto-transformer | — | 2003-02-25 |
| 6191968 | Wye connected 3-phase to 9-phase auto-transformer with reduced winding currents | — | 2001-02-20 |
| 6101113 | Transformers for multipulse AC/DC converters | — | 2000-08-08 |
| 5781428 | Transformer for 12-pulse series connection of converters | — | 1998-07-14 |
| 5455759 | Symmetrical, phase-shifting, fork transformer | — | 1995-10-03 |
| 5148357 | Auto-connected hexagon transformer for a 12-pulse converter | — | 1992-09-15 |
| 5124904 | Optimized 18-pulse type AC/DC, or DC/AC, converter system | — | 1992-06-23 |
| 4876634 | Multi-pulse converter system | — | 1989-10-24 |
| 4719398 | Coasting AC motor restart system and method | — | 1988-01-12 |
| 4698739 | 12-Pulse motor drive | — | 1987-10-06 |
| 4674024 | High voltage modular inverter and control system thereof | Charles Edwards | 1987-06-16 |
| 4634981 | Method for testing a circuit breaker using a three terminal current transformer | Alan B. Shimp | 1987-01-06 |
| 4618906 | Hybrid solid state/mechanical switch with failure protection | Kenneth E. Mattern | 1986-10-21 |
| 4463400 | DC Static switch with phase commutation | Peter Wood | 1984-07-31 |
| 4438474 | Current limiter and VAR generator utilizing a superconducting coil | — | 1984-03-20 |
| 4406991 | High power resonance filters | Eugene C. Strycula, Laszlo Gyugyi | 1983-09-27 |
| 4296450 | Discriminating circuit breaker protection system direct current power distribution systems | Alan B. Shimp | 1981-10-20 |
| 4220896 | High frequency lighting inverter with constant power ballast | — | 1980-09-02 |
| 4209739 | Portable calibrator for d.c. circuit breakers | — | 1980-06-24 |