DIFF Subgroup
A61M 16/206 Full Title
Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators (iron lungs A61H31/02); Tracheal tubes > Valves specially adapted to medical respiratory devices
A61M 16/206 Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators (iron lungs A61H31/02); Tracheal tubes > Valves specially adapted to medical respiratory devices