Donald E. Ballard
14Patents
8h-index
8Co-inventors
61Inventor score
Filing activity: Mar 19, 1981 → Jan 11, 1993
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4734975A | Method of manufacturing an amorphous metal transformer core and coil assembly | Emerging Cross-Sectional Technologies | 51 | Expired |
| US4413406A | Processing amorphous metal into packets by bonding with low melting point material | Emerging Cross-Sectional Technologies | 45 | Expired |
| US5005456A | Hot shear cutting of amorphous alloy ribbon | Emerging Cross-Sectional Technologies | 35 | Expired |
| US4789849A | Amorphous metal transformer core and coil assembly | Electricity | 21 | Expired |
| US4741096A | Method of manufacturing wound transformer core | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4814736A | Wound transformer core | Electricity | 12 | Expired |
| US5093981A | Method for making a transformer core comprising amorphous metal strips surrounding the core window | Emerging Cross-Sectional Technologies | 11 | Expired |
| US5285565A | Method for making a transformer core comprising amorphous steel strips surrounding the core window | Emerging Cross-Sectional Technologies | 11 | Expired |
| US5050294A | Method for making a transformer core comprising amorphous steel strips surrounding the core window | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4790064A | Method of manufacturing an amorphous metal transformer core and coil assembly | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4847987A | Method of making a core and coil assembly | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4924201A | Core and coil assembly for a transformer having an amorphous steel core | Electricity | 5 | Expired |
| US5291648A | Apparatus for making a transformer core comprising amorphous metal strips surrounding the core window | Emerging Cross-Sectional Technologies | 4 | Expired |
| US5321379A | Transformer with amorphous alloy core having chip containment means | Electricity | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.