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| Number | Title | Issue Date |
| 6909289 | Electrical high tension tester An electrical high tension test device having first and second contacts connectable to a high tension circuit, a first electrode connected to one contact; a second electrode connected to the second contact, the first and second electrodes being spaced apart from one... | 06/21/2005 |
| D488126 | Transformer housing | 04/06/2004 |
| 5847910 | Fault protection device in a transformer A fault protection device incorporated in a transformer having a primary winding and at least two secondary windings connected to ground, and having a sensing coil to sense the fluxes generated by each of the secondary windings and generating a flux signa... | 12/08/1998 |
