| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 4 | |
| #2 | Australia | 1 | |
| #3 | Brazil | 1 | |
| #4 | Canada | 1 | |
| #5 | Germany | 1 | |
| #6 | France | 1 | |
| #7 | United Kingdom | 1 | |
| #8 | Italy | 1 | |
| #9 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Audio-visual technology |
| # | Technology | |
|---|---|---|
| #1 | AC and DC conversion devices | |
| #2 | Casings and printed circuits |
| # | Name | Total Patents |
|---|---|---|
| #1 | Phillips E | 4 |
| #2 | Phillips Edward H | 2 |
| #3 | Underwood R | 2 |
| #4 | Underwood R D | 1 |
| #5 | Underwood Raymond D | 1 |
| #6 | Underwool R | 1 |
| #7 | Phillips Edward Harrison | 1 |
| #8 | Underwood Raymond Derral | 1 |
| #9 | Phillips E H | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3820006A | Power converter apparatus and silicon controlled rectifier switching circuit therefor | |
| US3713013A | Voltage controlled inverter circuit for variable supply voltages and loads | |
| US3864607A | Stackable heat sink assembly | |
| US3786335A | Power conversion apparatus and system therefor |