| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 9 | |
| #2 | Canada | 1 | |
| #3 | Germany | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Basic communication technologies | |
| #3 | Machines | |
| #4 | Telecommunications | |
| #5 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Resistors | |
| #2 | Unspecified technologies | |
| #3 | Magnets and transformers | |
| #4 | Transmission | |
| #5 | Electromechanical clocks | |
| #6 | Amplifiers | |
| #7 | Capacitors and switching devices | |
| #8 | Tuning resonant circuits |
| # | Name | Total Patents |
|---|---|---|
| #1 | Snell James C | 8 |
| #2 | Doak Robert S | 1 |
| #3 | Chappel James M | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1877825A | Radio circuit | |
| US1714326A | Radio frequency set | |
| US1638598A | Rheostat | |
| US1743870A | Electrical condenser | |
| US1672916A | Potentiometer | |
| US1526441A | Rheostat | |
| US1739050A | Electrical condenser | |
| US1497411A | Transformer | |
| US1052408A | Time-switch. | |
| CA252417A | Rheostat |