| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 3 | |
| #2 | EPO (European Patent Office) | 3 | |
| #3 | Australia | 2 | |
| #4 | United States | 2 | |
| #5 | South Africa | 2 | |
| #6 | Brazil | 1 | |
| #7 | Japan | 1 | |
| #8 | Republic of Korea | 1 | |
| #9 | Mexico | 1 |
| # | Industry | |
|---|---|---|
| #1 | Control | |
| #2 | Electrical machinery and energy | |
| #3 | Machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hoffman Philip A | 8 |
| #2 | Mccarty George W | 3 |
| #3 | Smith Iii Somers Hanson | 2 |
| #4 | Frey Douglas R | 2 |
| #5 | Hoffman Philip K | 2 |
| #6 | Hoffman Philip Austin | 2 |
| #7 | Hoffman Philips A | 1 |
| #8 | Smith Somers H Iii | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US5270635A | Universal battery charger | |
| US5113127A | Universal battery charger | |
| CA1250347A | Multistation modular charging system for cordless devices | |
| EP0135636A2 | Power supply with current regulating circuit |