Pj mask

The forerunner to the modern gas mask was invented in 1847 by Lewis P. Haslett , a device that contained elements that allowed breathing through a nose and mouthpiece, inhalation of air through a bulb-shaped filter, and a vent to exhale air back into the atmosphere. [8] According to First Facts, it states that the "gas mask resembling the modern type was patented by Lewis Phectic Haslett of Louisville, Kentucky who received a patent on June 12, 1849." [9] . patent #6,529 issued to Haslett, described the first "Inhaler or Lung Protector" that filtered dust from the air . [10]

Pj mask

p j mask


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