| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 6 | |
| #2 | United States | 6 | |
| #3 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Electrical machinery and energy | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Measuring volume | |
| #2 | Electric switches | |
| #3 | Pistons and sealings | |
| #4 | Measuring speed and acceleration |
| # | Name | Total Patents |
|---|---|---|
| #1 | Grostick Norman L | 10 |
| #2 | Rauth Robert W | 1 |
| #3 | Baird James D | 1 |
| #4 | Yee Lee | 1 |
| Publication | Filing date | Title |
|---|---|---|
| FR1517593A | Electro-optical motion detector | |
| US3412877A | Electrical-optical material level control | |
| US3283092A | Liquid level indicator | |
| US3175831A | Rotary seal assembly | |
| US3018343A | Bin level indicator | |
| US3042767A | Motion indicator | |
| US2851553A | Bin level indicator | |
| CA770250A | Liquid level indicator | |
| CA668113A | Bin level indicator | |
| CA763307A | Rotary seal assembly | |
| CA582915A | Bin level indicator | |
| CA637899A | Motion indicator | |
| CA912852A | Non-contact ultrasonic interface viscosity and percent solid detecting device |