| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 3 | |
| #2 | Argentina | 1 | |
| #3 | Austria | 1 | |
| #4 | Australia | 1 | |
| #5 | Brazil | 1 | |
| #6 | Canada | 1 | |
| #7 | Germany | 1 | |
| #8 | France | 1 | |
| #9 | Italy | 1 | |
| #10 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Electric motor controls | |
| #2 | Unspecified technologies | |
| #3 | AC and DC conversion devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Henderson Ian | 3 |
| #2 | Henderson I | 2 |
| #3 | Medstead Alton | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1416682A | Electric apparatus for supplying current pulses to a load device | |
| GB1445972A | Motor control apparatus | |
| GB1416681A | Electric motor control apparatus |