| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 7 | |
| #2 | EPO (European Patent Office) | 2 | |
| #3 | WIPO (World Intellectual Property Organization) | 2 | |
| #4 | Australia | 1 | |
| #5 | Brazil | 1 | |
| #6 | Canada | 1 | |
| #7 | Mexico | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Dynamo-electric machines | |
| #2 | Electric motor controls |
| # | Name | Total Patents |
|---|---|---|
| #1 | Durham Gary L | 15 |
| #2 | Durham Harold S | 12 |
| #3 | Durham Harold Stephen | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US2006273681A1 | Starting system for salient-poled-rotor electric motor | |
| US2007278887A1 | Single field rotor motor | |
| US2007063609A1 | Single field rotor motor | |
| US7276831B1 | Split-pole field-match motor | |
| US6611078B1 | Flux diode motor |