Kolkata scientist invents battery operated pocket ventilator

Kolkata scientist Dr. Ramendra Lal Mukherjee has developed a portable battery-operated ventilator. It can be charged with the help of a mobile charger and can work for 8 hours at a time. Mukherjee said that this ventilator has two parts - a power unit and a ventilator unit. With the small knob, a patient regulated the amount of oxygen.