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Class Information
Number: 4/209FF
Name: Baths, closets, sinks, and spittoons > Ventilation > With fluid filter

Patents under this class:

Patent Number Title Of Patent Date Issued
6681412 PTFE membrane filter for exhaust air of vacuum toilet system Jan. 27, 2004
6678900 Bowl ventilation apparatus with proximity sensor Jan. 20, 2004
6550072 Bowl ventilation apparatus Apr. 22, 2003
6519786 Toilet splash shield system Feb. 18, 2003
5806104 Toilet deodorizing device utilizing liquid deodorant Sep. 15, 1998
5560048 Water closet exhaust collector Oct. 1, 1996
5355537 Environmentally controlled portable toilet Oct. 18, 1994
5341521 Environmentally controlled standard toilet Aug. 30, 1994
5333321 Environmentally controlled commercial/public toilet Aug. 2, 1994
5210884 Environmentally controlled toilet May. 18, 1993
4991623 Automatic air valves for ducts Feb. 12, 1991
4974632 Automatic air valves for ducts Dec. 4, 1990
4726078 Toilet ventilation system Feb. 23, 1988
4630530 Filtering systems for buses Dec. 23, 1986
4608175 Integral waste disposal system Aug. 26, 1986
4025325 Portable ventilating air filtering device for toilets May. 24, 1977

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