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Alex Zelczer
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Cleveland Heights, OH, US
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Patents Grants
last 30 patents
Information
Patent Grant
Modulating bypass control system and method
Patent number
7,178,545
Issue date
Feb 20, 2007
ABCO Consulting, Inc.
Alex Zelczer
G05 - CONTROLLING REGULATING
Information
Patent Grant
Fluid flow control damper assembly
Patent number
6,817,378
Issue date
Nov 16, 2004
ABCO Consulting, Inc.
Alex Zelczer
F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information
Patent Grant
Fluid flow control damper assembly
Patent number
6,698,445
Issue date
Mar 2, 2004
Alex Zelczer
F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information
Patent Grant
Fluid flow control damper assembly
Patent number
6,564,819
Issue date
May 20, 2003
Alex Zelczer
F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information
Patent Grant
Fluid flow control damper assembly and method
Patent number
6,105,927
Issue date
Aug 22, 2000
Alex Zelczer
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Pipe and duct run locator
Patent number
5,553,498
Issue date
Sep 10, 1996
Alex Zelczer
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Grant
Fluid flow control damper assembly and method
Patent number
5,458,148
Issue date
Oct 17, 1995
Alex Zelczer
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Flow control bladders for zone control apparatus
Patent number
5,170,986
Issue date
Dec 15, 1992
Alex Zelczer
F24 - HEATING RANGES VENTILATING
Information
Patent Grant
Zone control and smoke damping apparatus for central heating and/or...
Patent number
4,848,654
Issue date
Jul 18, 1989
Alex Zelczer
F24 - HEATING RANGES VENTILATING
Information
Patent Grant
Zone control apparatus for central heating and/or cooling systems
Patent number
4,742,956
Issue date
May 10, 1988
Alex Zelczer
G05 - CONTROLLING REGULATING
Information
Patent Grant
Zone control apparatus for central heating and/or cooling systems
Patent number
4,702,412
Issue date
Oct 27, 1987
Alex Zelczer
F24 - HEATING RANGES VENTILATING
Information
Patent Grant
Zone control apparatus for central heating and/or cooling systems
Patent number
4,600,144
Issue date
Jul 15, 1986
Alex Zelczer
G05 - CONTROLLING REGULATING
Information
Patent Grant
Zone control apparatus for central heating and/or cooling systems
Patent number
4,545,524
Issue date
Oct 8, 1985
Alex Zelczer
G05 - CONTROLLING REGULATING
Patents Applications
last 30 patents
Information
Patent Application
Modulating bypass control system and method
Publication number
20050178433
Publication date
Aug 18, 2005
Alex Zelczer
G05 - CONTROLLING REGULATING
Information
Patent Application
Fluid flow control damper assembly
Publication number
20030106592
Publication date
Jun 12, 2003
Alex Zelczer
F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information
Patent Application
Fluid flow control damper assembly
Publication number
20020179159
Publication date
Dec 5, 2002
Alex Zelczer
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Application
Fluid flow control damper assembly
Publication number
20020144737
Publication date
Oct 10, 2002
Alex Zelczer
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...