| VENTOSTAT GAZTECH CORPORATION
74169167 23 May 1991 | on 29 Aug 2000 | control unit for heating, ventilating and air conditioning systems to ... Class 011 Class 011 Environmental Control Instrument Products (lighting,heating,cooling,cooking) control unit for heating, ventilating and air conditioning systems to regulate the concentration of carbon dioxide by introducing fresh air into the system | | | CO ALERT GAZTECH CORPORATION
74143697 01 Mar 1991 | on 03 Jul 2000 | carbon monoxide sensors,carbon monoxide sensors Class 009 Class 009 Computer & Software Products & Electrical & Scientific Products carbon monoxide sensors | | | TUNEAIRE GAZTECH CORPORATION
74123546 14 Dec 1990 | on 11 Jan 1999 | air conditioner which detects an elevated level of carbon dioxide in t... Class 011 Class 011 Environmental Control Instrument Products (lighting,heating,cooling,cooking) tune-aire | | | CONDITIONAIRE GAZTECH CORPORATION
74169166 23 May 1991 | on 10 Dec 1992 | control unit for heating, ventilating and air conditioning systems to ... Class 011 Class 011 Environmental Control Instrument Products (lighting,heating,cooling,cooking) control unit for heating, ventilating and air conditioning systems to regulate the concentration of carbon dioxide by introducing fresh air into system | | | VENTOMETER GAZTECH CORPORATION
74169168 23 May 1991 | on 10 Dec 1992 | carbon dioxide sensor unit for use in heating ventilating and air cond... Class 011 Class 011 Environmental Control Instrument Products (lighting,heating,cooling,cooking) carbon dioxide sensor unit for use in heating ventilating and air conditioning systems | | | TELAIRE GAZTECH CORPORATION
74123547 14 Dec 1990 | on 30 Apr 1992 | meter for sensing and indicating the concentration of carbon dioxide i... Class 009 Class 009 Computer & Software Products & Electrical & Scientific Products meter for sensing and indicating the concentration of carbon dioxide in the air | | 
