Ratz; James W.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Ratz; James W..The latest application filed is for "variable output heating and cooling control".
- Ratz; James W. - Bloomington MN
| Patent | Date |
|---|---|
| Variable output heating and cooling control Grant 7,293,718 - Sigafus , et al. November 13, 2 | 2007-11-13 |
| Variable output heating and cooling control App 20050159844 - Sigafus, Paul E. ; et al. | 2005-07-21 |
| Variable output heating and cooling control Grant 6,866,202 - Sigafus , et al. March 15, 2 | 2005-03-15 |
| Variable speed controller for air moving applications using an AC induction motor Grant 6,864,659 - Ratz , et al. March 8, 2 | 2005-03-08 |
| Variable output heating and cooling control App 20030059730 - Sigafus, Paul E. ; et al. | 2003-03-27 |
| Variable speed controller for air moving applications using an AC induction motor App 20030030408 - Ratz, James W. ; et al. | 2003-02-13 |
| System powered power supply using dual transformer HVAC systems Grant 5,352,930 - Ratz October 4, 1 | 1994-10-04 |
| Electronic time thermostat with a temporary next period adjustment means Grant 5,230,482 - Ratz , et al. July 27, 1 | 1993-07-27 |
| Active low temperature limit for battery powered thermostat Grant 5,226,591 - Ratz July 13, 1 | 1993-07-13 |
| Communicating thermostat Grant 5,203,497 - Ratz , et al. April 20, 1 | 1993-04-20 |
| Communicating thermostat Grant 5,197,668 - Ratz , et al. March 30, 1 | 1993-03-30 |
| Servo apparatus with electrical motion limiting Grant 4,250,441 - Chapman , et al. February 10, 1 | 1981-02-10 |
| Pulse Difference Counter Grant 3,808,407 - Ratz April 30, 1 | 1974-04-30 |
| Shaft Speed Monitoring Circuit Grant 3,792,460 - Ratz February 12, 1 | 1974-02-12 |
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