Robert Portner | |
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| Born | March 20, 1837 |
| Died | May 29, 1906 |
| Occupation(s) | Brewer, Brewery Owner |
| Known for | Owner, Robert Portner Brewing Company |
Robert Portner (20 March 1837 – 29 May 1906) was an American grocer-turned-brewer who supplied beer to Union troops during the American Civil War. Based in Alexandria, Virginia, Portner found success after the war with the Robert Portner Brewing Company. Portner patented two brewing-related systems, one to purify air and the other to cool beer.