Scientific, optical, weighing, measuring, signaling, checking (supervision), life-saving and teaching apparatus and instruments; apparatus and instruments for conducting and for switching, converting, storing, controlling and monitoring electricity; fire-extinguishing apparatus; sprinkler systems for fire protection; cathodic anti-corrosion apparatus.

Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, water supply and sanitary purposes; apparatus and installations for purification of water and waste water; air valves for steam heating installations; purification installations for sewage; brackets for gas burners; swimming pools chlorinating units; disinfectant apparatus; water heaters; heating installations; ionization apparatus for the treatment of air or water; cooling installations for liquids; water-pipes for sanitary installations; filters for air conditioning; air filtering installations; air cooling apparatus; air purifying apparatus and machines; germicidal lamps for purifying air; germicidal lamps for purifying water; desalination plants; regulating and safety accessories for water apparatus; regulating accessories for water or gas apparatus and pipes; boiler pipes; taps [cocks, spigots] faucets [Am.] for pipes; coils [parts of distilling, heating or cooling installations]; apparatus for sanitary purposes; filters for drinking water; heat pumps; heat regenerators; heat accumulators; heat exchangers, not parts of machines; water heaters [apparatus]; water heaters; heating installations [water]; water softeners; water filtering apparatus; water coolers; water distribution installations; water purification installations; water purifying apparatus and machines; water sterilizers; water supply installations; water distribution installations; tap water faucets; whirlpool-jet apparatus; central heating radiators.

Building construction; repair services, namely repair of scientific, optical, weighing, signalling, checking (supervision), life-saving and teaching apparatus and instruments, apparatus and instruments for conducting and for switching, converting, storing, controlling and monitoring electricity, fire-extinguishing apparatus, sprinkler systems for fire protection, apparatus for lighting, steam generating, cooking, refrigerating, drying, water supply and sanitary purposes, apparatus and installations for purification of water and waste water, air valves for steam heating installations, purification installations for sewage, brackets for gas burners, swimming pools chlorinating units, disinfectant apparatus, water heaters, heating installations, ionization apparatus for treatment of air and water, cooling installations for liquids, water-pipes for sanitary installations, filters for air conditioning, air filtering installations, air cooling apparatus, air purifying apparatus and machines, germidicial lamps for purifying air, germidicial lamps for purifying water, desalination plants, regulating and safety accessories for water apparatus, regulating accessories for water or gas apparatus and pipes, boiler pipes, taps (cocks, spigots) faucets (Am.) for pipes, coils (parts for distilling, heating or cooling installations), apparatus for sanitary purposes, filters for drinking water, heat pumps, heat regenerators, heat accumulators, heat exchangers, water heaters (apparatus), water heaters, heating installations (water), water softeners, water filtering apparatus, water coolers, water distribution installations, water purification installations, water purifying apparatus and machines, water sterilizers, water supply installations, water distribution installations, tap water faucets, whirlpool-jet apparatus and central heating radiators; installation services, namely installation of scientific, optical, weighing, signalling, checking (supervision), life-saving and teaching apparatus and instruments, apparatus and instruments for conducting and for switching, converting, storing, controlling and monitoring electricity, fire-extinguishing apparatus, sprinkler systems for fire protection, cathodic anti-corrosion apparatus, apparatus for lighting, steam generating, cooking, refrigerating, drying, water supply and sanitary purposes, apparatus and installations for purification of water and waste water, air valves for steam heating installations, purification installations for sewage, brackets for gas burners, swimming pools chlorinating units, disinfectant apparatus, water heaters, heating installations, ionization apparatus for the treatment of air and water, cooling installations for liquids, water-pipes for sanitary installations, filters for air conditioning, air filtering installations, air cooling apparatus, air purifying apparatus and machines, germidicial lamps for purifying air, germidicial lamps for purifying water, desalination plants, regulating and safety accessories for water apparatus, regulating accessories for water or gas apparatus and pipes, boiler pipes, taps (cocks, spigots) faucets (Am.) for pipes, coils (parts for distilling, heating or cooling installations), apparatus for sanitary purposes, filters for drinking water, heat pumps, heat regenerators, heat accumulators, heat exchangers, water heaters (apparatus), water heaters, heating installations (water), water softeners, water filtering apparatus, water coolers, water distribution installations, water purification installations, water purifying apparatus and machines, water sterilizers, water supply installations, water distribution installations, tap water faucets, whirlpool-jet apparatus and central heating radiators; repair information; disinfecting; heating equipment installation and repair; freezing equipment installation and repair; furnace installation and repair; swimming-pool maintenance; pump repair; rustproofing; installation services, namely inserting and replacing of the following goods in water treatment apparatus and installations, heating or cooling installations and sanitary apparatus and installations: chemicals for use in industry and science, unprocessed artificial resins, fire extinguishing compositions, chemical substances for analyses in laboratories, other than for medical or veterinary purposes, chemical compositions for water treatment, scale removing preparations, other than for household purposes, dehydrating preparations for industrial purposes, enzymes for industrial purposes, carbon for filters, filtering materials [chemical preparations], filtering materials [unprocessed plastics], filtering materials [mineral substances], filtering materials [vegetable substances], ceramic materials in particulate form, for use as filtering media, filtering preparations for the beverages industry, ion exchangers [chemicals], catalysts, salts [chemical preparations], unprocessed artificial resins, disinfectants, preparations for destroying vermin, fungicides, herbicides, bacterial poisons, biocides, air purifying preparations, mineral water salts in water treatment treatment apparatus and installations, heating or cooling installations and sanitary apparatus installations.

Scientific and technological services and research and design relating thereto; industrial analysis and research services; design and development of computer hardware and software; engineering services, technical project studies relating to water purification installations; surveying and development of processes in the fields of water and waste water treatment; chemistry services; chemical analysis; surveying; technical research; mechanical research; research and development services relating to new products for others; quality control; water analysis; chemical laboratory services for the regeneration of enzymes for industrial purposes, carbon for filters, ion exchangers (chemicals), chemical catalysts and filtering materials in the form of chemical filter preparations, unprocessed plastic mineral substances, vegetable substances and ceramic materials in particulate form, for use as filtering media.

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.

Medical apparatus and instruments, medicinal apparatus and instruments; installations for medicinal baths; apparatus for physiotherapy; sun-ray equipment for medical and cosmetic purposes.

Lighting, heating and water supply equipment; apparatus and equipment for treating water and sewage, sanitary equipment.

Engineer's services, project planning for water treatment plants; drawing up of experts' reports and development of water and sewage treatment methods.