10 house mark for a line of dental operatory apparatus; dental cabinetry; dental chairs; dental stools; dental delivery systems consisting of apparatus for providing compressed air and water, and holders and trays for dental instruments; furniture for holding dental instruments; dental operatory work implements; autoclaves for dental use; parts for the foregoing; housemark for a line of lamps and electric lighting fixtures, water supply units and dehumidifiers, for medical use in the field of dentistry