IC 009. US 021 023 026 036 038. G & S: Electric, chemical and physical regulating and control apparatus, measuring, testing and checking apparatus for gases and liquids; apparatus for measuring and monitoring pressures, temperatures and flow rate quantities, and for gas analysis; switchboards and electronic control panels for controlling and regulating the addition of gas for industrial apparatus and processes, mainly comprising sensors, display instruments, adjustment mechanisms, flow and pressure switches, and quantity regulators

IC 011. US 013 021 023 031 034. G & S: Ventilating and gas regulating apparatus, namely, apparatus and equipment for the controlled introduction of gases into closed containers and parts of containers, in particular in containers and tanks used in the food, chemical and pharmaceutical industries, mainly consisting of gas reservoirs and gas conducting and regulating safety fittings; regulating and safety fittings for gas apparatuses and gas pipelines, in particular combinations of switching and control valves, and sensor systems consisting primarily of gas regulators being parts of gas supplying apparatus