Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6021034 | Ground fault protection circuit for multiple loads with separate GFCI branches and a common neutral for the GFCI electronics | David Chan | 2000-02-01 |
| 5865303 | Electrical rocker switch | Serge Krzyzanowski | 1999-02-02 |
| 5864455 | In-line cord ground fault circuit interrupter | David Chan, Serge Krzyzanowski, James Richter | 1999-01-26 |
| 5836443 | Electrical rocker switch | Serge Krzyzanowski, Frantz Germain | 1998-11-17 |
| 5786971 | Ground fault protection circuit for multiple loads with separate GFCI branches and a common neutral for the GFCI electronics | David Chan | 1998-07-28 |
| 5712450 | Splash guard for wiring devices | David Chan | 1998-01-27 |
| 5684272 | In-line cord ground fault circuit interrupter | David Chan, Serge Krzyzanowski | 1997-11-04 |
| 5680287 | In-line cord ground fault circuit interrupter | David Chan, Serge Krzyzanowski | 1997-10-21 |
| 5647479 | Electrical rocker switch | Serge Krzyzanowski | 1997-07-15 |
| 5570778 | Electrical rocker switch | Serge Krzyzanowski | 1996-11-05 |
| 5568344 | In-line cord ground fault circuit interrupter | David Chan, Serge Krzyzanowski | 1996-10-22 |
| 4688134 | Ground fault circuit interrupter and electronic detection circuit | LeRoy M. Freeman, Ferdinand E. Orbeta | 1987-08-18 |
| 4630015 | Ground fault circuit interrupter | Ferdinand E. Orbeta | 1986-12-16 |
| 4416732 | Horizontal coke oven battery | Heinz Thubeauville, Carl-Heinz Struck | 1983-11-22 |
| 4372754 | Ignition system for coal gasifier | Wilhelm Danguillier, Karl Peter, Wolfgang Grams, Siegfried Pohl, Peter B. Schnitzler | 1983-02-08 |
| D266958 | Portable indirect lighting fixture for office partitions or the like | — | 1982-11-16 |
| 4188915 | Water-cooled, high-temperature gasifier | Joachim Kummel, Heinz Dressen, Wilhelm Danguillier, Wolfgang Grams, Siegfried Pohl | 1980-02-19 |