enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Air purifier - Wikipedia

   en.wikipedia.org/wiki/Air_purifier

   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 ...

3. Respirator - Wikipedia

   en.wikipedia.org/wiki/Respirator

   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]

4. John Stenhouse - Wikipedia

   en.wikipedia.org/wiki/John_Stenhouse

   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.

5. Do Air Purifiers Actually Work? Here's What Experts Say - AOL

   www.aol.com/air-purifiers-actually-heres-experts...

   The best air purifiers work to improve the air quality inside your home, cleansing the air you breathe each day and limiting the impact that air pollution has on your family.

6. The air purifier you bought during the pandemic may still ...

   www.aol.com/news/air-purifier-bought-during...

   Risks from the Covid-19 pandemic and increasingly intense wildfire seasons sparked interest in air purifiers as a tool to keep indoor air healthy. But experts say they can be just as important to ...

7. Exhaustion doctrine under U.S. law - Wikipedia

   en.wikipedia.org/wiki/Exhaustion_doctrine_under...

   See also Exhaustion of intellectual property rights for a general introduction not limited to U.S. law.. The exhaustion doctrine, also referred to as the first sale doctrine, [1] is a U.S. common law patent doctrine that limits the extent to which patent holders can control an individual article of a patented product after a so-called authorized sale.