Tempmaster Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4694988 Control installation for variable volume air diffusersExpiredDec 05, 86Sep 22, 87[F24F]
4694989 Control installation for variable volume air diffusersExpiredDec 05, 86Sep 22, 87[F24F]
4659236 Flush mounted temperature sensorExpiredOct 21, 85Apr 21, 87[G01K]
4648552 Control installation for variable volume air diffusersExpiredMar 10, 86Mar 10, 87[F24F]
4634047 Thermostatically adjustable pressure regulatorExpiredSep 13, 85Jan 06, 87[F24F]
4572327 Sound attenuatorExpiredNov 07, 84Feb 25, 86[E04B]
4513574 Low Temperature air conditioning system and methodExpiredApr 30, 84Apr 30, 85[F24F]
4500034 Electronic control arrangement for system powered HVAC terminal unitsExpiredSep 30, 82Feb 19, 85[G05D, F24F]
4489881 Air delivery system for hospital rooms and the likeExpiredJan 30, 84Dec 25, 84[F24F]
4442760 Flow splitting arrangement for air conditioning terminal unitsExpiredSep 30, 82Apr 17, 84[F24F]
4432434 Sound absorbing arrangement for air handling unitsExpiredJan 07, 82Feb 21, 84[F01N]
4399739 Noise attenuating apparatus for modulating air flowExpiredDec 16, 80Aug 23, 83[F24F]
4356963 Flow adjustment mechanism for air distribution systemsExpiredAug 03, 81Nov 02, 82[F24F]
4331291 Pneumatic control circuit for air distribution systemsExpiredOct 14, 80May 25, 82[F24F]
4312475 Flow adjustment mechanism for air distributor systemsExpiredOct 27, 80Jan 26, 82[F24F]
4246918 Method and apparatus for forced air balancing of damper bladesExpiredFeb 09, 79Jan 27, 81[F16K]

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