The indoor air quality system (10) comprises a ventilation system (16) and a corona discharge apparatus (18).

The gas ionisation is carried out by generating in the gas flow a corona discharge ensuring a concentration of the ions thus formed which is superior or equal to 105/cm3.

The spot ventilator (12,14,16,18) includes a passage (36) and at least one corona discharge apparatus (50).

The distal end is provided with a tip structure (6A1) configured to generate a corona discharge.

A process for creating plasma polymerized deposition on a substrate by a corona discharge is described.

A number of corona electrodes (6A) is disposed in the airflow duct wherein each of the corona electrodes comprises an elongated body (6A2) with a distal end (61) and a proximal end (62).

A corona-discharge type, preionizer assembly for a gas discharge laser is disclosed.

Apparatuses, systems and methods for detecting corona using audio data are disclosed.

An electrostatic air cleaner comprises a corona charging section and a precipitation section.

Corona formation occurs exclusively during voltage impulses and only at the areas of curvature (6).

The reservoir is adapted to receive effluent from the wound and the pump is capable of maintaining a controlled level of suction at the wound.