| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 6 | |
| #2 | Germany | 2 | |
| #3 | EPO (European Patent Office) | 2 | |
| #4 | France | 2 | |
| #5 | United States | 2 | |
| #6 | Canada | 1 | |
| #7 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Basic communication technologies |
| # | Technology | |
|---|---|---|
| #1 | Amplifiers | |
| #2 | Magnets and transformers | |
| #3 | AC and DC conversion devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Billings Keith Hugh | 4 |
| #2 | Heffernan William John Baxter | 2 |
| #3 | Billings Keith H | 2 |
| #4 | Evans Peter David | 2 |
| #5 | Evans Peter D | 1 |
| #6 | Heffernan William J B | 1 |
| #7 | Duff Ian David | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB9124228D0 | Flat transformer,and method and apparatus for electrically connecting metal layers across an intermediate plastics layer | |
| GB9019571D0 | Power transformers and coupled inductors with optimally interleaved windings | |
| GB8712066D0 | Electrotech transformers | |
| GB2079014A | Variable electrical power supplies | |
| FR2484730A1 | VARIABLE ELECTRIC CURRENT SUPPLY UNIT | |
| GB2075786A | Switch mode converters |