Zelczer; Alex
Patent Applications and Registrations
Patent applications and USPTO patent grants for Zelczer; Alex.The latest application filed is for "modulating bypass control system and method".
- Zelczer; Alex - Cleveland Hts. OH
- Zelczer; Alex - Cleveland Heights OH
| Patent | Date |
|---|---|
| Modulating bypass control system and method Grant 7,178,545 - Zelczer , et al. February 20, 2 | 2007-02-20 |
| Modulating bypass control system and method App 20050178433 - Zelczer, Alex ; et al. | 2005-08-18 |
| Fluid flow control damper assembly Grant 6,817,378 - Zelczer November 16, 2 | 2004-11-16 |
| Fluid flow control damper assembly Grant 6,698,445 - Zelczer March 2, 2 | 2004-03-02 |
| Fluid flow control damper assembly App 20030106592 - Zelczer, Alex | 2003-06-12 |
| Fluid flow control damper assembly Grant 6,564,819 - Zelczer May 20, 2 | 2003-05-20 |
| Fluid flow control damper assembly App 20020179159 - Zelczer, Alex | 2002-12-05 |
| Fluid flow control damper assembly App 20020144737 - Zelczer, Alex | 2002-10-10 |
| Fluid flow control damper assembly and method Grant 6,105,927 - Zelczer , et al. August 22, 2 | 2000-08-22 |
| Zone control and smoke damping apparatus for central heating and/or cooling systems Grant 4,848,654 - Zelczer , et al. July 18, 1 | 1989-07-18 |
| Zone control apparatus for central heating and/or cooling systems Grant 4,742,956 - Zelczer May 10, 1 | 1988-05-10 |
| Zone control apparatus for central heating and/or cooling systems Grant 4,702,412 - Zelczer , et al. October 27, 1 | 1987-10-27 |
| Zone control apparatus for central heating and/or cooling systems Grant 4,600,144 - Zelczer July 15, 1 | 1986-07-15 |
| Zone control apparatus for central heating and/or cooling systems Grant 4,545,524 - Zelczer October 8, 1 | 1985-10-08 |
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