| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Canada | 4 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Mechanical elements | |
| #3 | Engines, pumps and turbines | |
| #4 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Measuring speed and acceleration | |
| #2 | Clutches and brakes | |
| #3 | Swimming pools | |
| #4 | Controlling combustion engines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Wilson Emery J | 12 |
| Publication | Filing date | Title |
|---|---|---|
| US1715633A | Speedometer | |
| US1416084A | Rotary speed indicator | |
| US1416083A | Rotary speed indicator | |
| US1466156A | Rotary speed indicator | |
| US1416082A | Rotary speed indicator | |
| US1267727A | Hoisting and conveying apparatus. | |
| US1249704A | Clutch. | |
| US949559A | Clutch mechanism. | |
| CA241828A | Rotary speed indicator | |
| CA241827A | Rotary speed indicator | |
| CA250277A | Rotary speed indicator | |
| CA241829A | Rotary speed indicator |