1 Chemical products for industrial purposes, chemical products for water treatment for industrial and household purposes; artificial resins and synthetic resins for use in water treatment and sewage treatment.
5 Disinfectants.
9 Electrotechnical and electronic apparatus and instruments (so far as contained in Class 9); measuring, checking and controlling apparatus; apparatus for the automatic dosage and delivery of chemicals.
10 Medical apparatus and instruments, medicinal apparatus and instruments; installations for medicinal baths; apparatus for physiotherapy; sun-ray equipment for medical and cosmetic purposes.
11 Lighting, heating and water supply equipment; apparatus and equipment for treating water and sewage, sanitary equipment.
42 Engineer's services, project planning for water treatment plants; drawing up of experts' reports and development of water and sewage treatment methods.
