74033073
Feb 27, 1990
Oct 15, 1991
electrostatic charge build-up and discharge regulators for rooms, particle identification and counting apparatus, and electrostatic field generators
Electrical and Scientific Apparatuselectronic purifying units; namely, air cleaners and air filter for commercial, industrial and domestic use, controlled environment hoods and chambers, ion generators, ventilators; and fullspectrum electric lighting units
Environmental Control Apparatus