| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 13 |
| # | Industry | |
|---|---|---|
| #1 | Control | |
| #2 | Machines | |
| #3 | Thermal processes | |
| #4 | Measurement | |
| #5 | Electrical machinery and energy | |
| #6 | Textiles and paper |
| # | Name | Total Patents |
|---|---|---|
| #1 | Dahl Edward T | 7 |
| #2 | Annin Douglas H | 3 |
| #3 | Stanton Avery H | 1 |
| #4 | Nikolai Belaef | 1 |
| #5 | Colby Harold L | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2180844A | Liquid level control device | |
| US2122362A | Control mechanism for paper making machines | |
| US2002686A | Multiple pen recorder | |
| US2007671A | Control instrument | |
| US1988348A | Control instrument | |
| US2002693A | Draft control | |
| US2002692A | Control mechanism | |
| US1987364A | Control mechanism | |
| US2030502A | Control mechanism | |
| US2016317A | Control mechanism | |
| US2050279A | Control mechanism | |
| US2016769A | Compensating attachment for pressure controllers | |
| US1991309A | Pilot valve pressure controller |