| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Furniture and games | |
| #4 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Venting or aerating devices | |
| #2 | Unspecified technologies | |
| #3 | Windows or door furnishings | |
| #4 | Domestic plumbing installations |
| # | Name | Total Patents |
|---|---|---|
| #1 | Koehler Gustave J | 13 |
| #2 | Koehler Gordon T | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US3219312A | Cam operated valve having preliminary rocking movement | |
| US2698731A | Fluid valve | |
| US2477186A | Control valve for fluids | |
| US2462646A | Fluid valve | |
| US2446334A | Fluid valve | |
| US2407789A | Fluid valve | |
| US2350905A | Fluid valve | |
| US2233840A | Liquid control valve | |
| US2226169A | Liquid control valve | |
| US2024694A | Curtain rod guiding device | |
| US1366734A | Portable shower-bath fixture | |
| CA467479A | Fluid valves | |
| CA467480A | Fluid valves |