Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Apparatus and a method for biological treatment of waste waters

Apparatus and a method for biological treatment of waste waters

US Patent 4421648 · Granted Dec 20, 1983

Assignee

No assignee recorded.

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Compact high efficiency gas fired steam generator-humidifier2007
Compact ultra high efficiency gas fired steam generator2002
Compact gas fired humidifier2001
Low nox burner1998
Burner for low No.sub.x multistage combustion of fuel with preheated combustion 1997
Apparatus for ultra high energy efficient heating, cooling and dehumidifying of 1991
Apparatus and a method for ultra high energy efficient dehumidification and cool1991
Apparatus for ventilation, recovery of heat, dehumidification and cooling of air1990
Regenerative bed heat exchanger1990
Heating and ventilating system1989
Apparatus for sorption dehumidification and cooling of moist air1987
Apparatus for balanced heat recovery ventilation - heating - humidification - de1987