Air curtains, namely, air blowers for room openings; air blades; air doors in the nature of high-powered electric air blowers for commercial use; environmental control apparatus, namely, air curtains in the nature of air blowers for promoting energy conservation, flying insect control, and efficiently separating rooms with two different temperatures

Backpack vacuum cleaners, upright vacuum cleaners, and canister vacuum cleaners; vacuum cleaner parts and accessories, namely, vacuum cleaner wands, vacuum cleaner hoses, vacuum cleaner dust brushes, vacuum cleaner suction nozzles, vacuum cleaner upholstery tools, vacuum cleaner crevice tools, vacuum cleaner hose reducer cuffs, and overhead pipe cleaning wands for vacuum cleaners; vacuum cleaner floor tools for use on carpeted floor surfaces, namely vacuum cleaner brushes; vacuum cleaner floo...

Backpack vacuum cleaners, upright vacuum cleaners, and canister vacuum cleaners; vacuum cleaner parts and accessories, namely, vacuum cleaner wands, vacuum cleaner hoses, vacuum cleaner dust brushes, vacuum cleaner suction nozzles, vacuum cleaner upholstery tools, vacuum cleaner crevice tools, vacuum cleaner hose reducer cuffs, and overhead pipe cleaning wands for vacuum cleaners; vacuum cleaner floor tools for use on carpeted floor surfaces, namely vacuum cleaner brushes; vacuum cleaner floo...

Headphones; earphones; audiometers for non-medical use; electronic sound amplifiers; electronic sound amplifiers for use in and together with earphones; electronic sound amplifiers for use in and together with earphones with noise control, noise suppression, impulse noise suppression and intelligent adaptive hearing protection circuitry to filter, subdue or control undesirable noise or sounds and to allow two-way communication in noisy and stressful environments; two-way or multi-directional ...