Bio-Therapeutic Skin Care Equipment and Products Est. 1974 in Seattle WA USA microcurrent, micro current, LED, wet|dry microdermabrasion, skin care, skin care products, skin care creams, facials, skin care facials, bt-cocktail Bio-Therapeutic Skin Care Equipment and Products since 1974. Located in Seattle, WA Bio-Therapeutic manufactures a wide range in the USA of Skin Care Equipment including award winning microcurrent, wet|dry microdermabrasion, and LED along with innovative hand held equipment that works in any Salon or Spa.