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An air purifier or air cleaner is a ... John Stenhouse filed two patents applying the absorbent properties of wood charcoal to air purification (patents 19 July ...
John Stenhouse's respirator. John Stenhouse was born in Barrhead in Glasgow on 21 October 1809. He was the eldest son of William Stenhouse, a calico-printer in the family firm of John Stenhouse & Co of 302 High Street, [2] Glasgow, and Elizabeth Currie; [3] he was the only one of their children to survive beyond infancy.
Woodcut of Stenhouse's mask. In 1848, the first US patent for an air-purifying respirator was granted to Lewis P. Haslett [5] for his 'Haslett's Lung Protector,' which filtered dust from the air using one-way clapper valves and a filter made of moistened wool or a similar porous substance. [6]
Air purifiers usually consist of a filter, or multiple filters, and a fan that sucks in and circulates air. As air moves through the filter, pollutants and particles are captured, and the clean ...
Marissa Wu. First, the unboxing and setup. Really, it was 20/20, no notes. The air purifier arrived minimally packaged—there was actually no additional packaging; it showed up to my door in its box.
The following is a list of celebrity inventors and their patents. (For the purposes of this article, an inventor is a person who has been granted a patent.)After Google released a patent search [1] online in December 2006, a website called Ironic Sans, [2] made the public aware of a number of celebrity patents found through the new patent search engine.
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