73303408
Mar 27, 1981
Oct 5, 1982
Pneumatic Conveyor Tube System, Comprising, Motorized Air Compressors and Exhausters, Terminals, Carriers, Tubing and Parts Therefor
MachineryVacuum Cleaning System for Industrial Use, Comprising, Motorized Compressors and Exhausters, Particle Separators, Particle Collectors, Tubing, Valves and Parts Therefor
Electrical and Scientific Apparatus