| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 18 | |
| #2 | Canada | 9 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Measurement | |
| #3 | Control | |
| #4 | Mechanical elements | |
| #5 | Textiles and paper | |
| #6 | Engines, pumps and turbines | |
| #7 | Civil engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Meyer Adolph F | 27 |
| Publication | Filing date | Title |
|---|---|---|
| US2823647A | Valve system and apparatus for controlling eluid actuated servomotor | |
| US2676616A | Valve apparatus | |
| US2691893A | Differential pressure gauge | |
| US2610648A | Valve apparatus | |
| US2242589A | Liquid level indicator | |
| US2250676A | Liquid level indicator | |
| US2179559A | Compound compensated governor | |
| US2105000A | Manometer | |
| US2050446A | Phenomenon indicating device | |
| US1713853A | Relay mechanism | |
| US1768918A | Relay | |
| US1963371A | Apparatus for controlling mechanisms | |
| US1648419A | Governor | |
| US1573986A | Spillway | |
| US1573985A | Valve structure | |
| US1404464A | Spring | |
| US1450380A | Governor | |
| US1061918A | Wall construction. | |
| CA394759A | Compound compensated governor | |
| CA230508A | Valve |