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2. 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.

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. 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 ...

5. AOL

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   The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web. AOL.

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

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

   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 ...

7. Google Patents - Wikipedia, the free encyclopedia

   en.wikipedia.org/wiki/Google_Patents

   Wikipedia entry for Google Patents.Google Patents is a search engine from Google that indexes patents and patent applications from the United States Patent and Trademark Office.

8. United States Patent and Trademark Office - Wikipedia

   en.wikipedia.org/wiki/United_States_Patent_and...

   The delay was attributed by spokesmen for the Patent Office to a combination of a sudden increase in business method patent filings after the 1998 State Street Bank decision, the unfamiliarity of patent examiners with the business and financial arts (e.g., banking, insurance, stock trading etc.), and the issuance of a number of controversial ...

9. List of people who have headed the United States Patent Office

   en.wikipedia.org/wiki/List_of_people_who_have...

   Patent Office Head [1] Began service: Ended service: Commissioners for the Promotion of Useful Arts or Patent Board [2] Edmund Randolph Henry Knox Thomas Jefferson: 1790: 1793 Secretary of State [3] [2] Edmund Randolph: 1794: 1795 Timothy Pickering: 1795: May 12, 1800 John Marshall: May 13, 1800: March 4, 1801 James Madison: March 5, 1801: 1802 ...