Pittsburgh, PA  -  O

• Henry J Oberhelm (1890)
  Henry J Oberhelm
  142 Wabash Ave
  

• Herman Obenauer (1884-1915)
  H Obernauer (1884-1885), H Obernauer & Co. (1887), Herman Obenauer (1890-1892), H Obernauer & Co. (1893-1899, 1901-1915), Herman Obernauer (1900)
  395 5th Ave (1884-1890), 400 5 th Ave (1892-1895), 1400 5 th Ave (1896-1899, 1901-1915), 900 5 th Ave (1900)
  

• Daniel Obenauer (1890-1908)
  Daniel Obenauer
  742 W Carson (1890), 114 Chartiers (1908)
  

• Jeremiah Obiecunas (1910-1918)
  Jeremiah (Jerry) Obiecunas
  4823 2 nd Ave
  

• John J O'Brian (1895-1898)
  John J O'Brian (originally O'Brien: 1895-1896)
  2908 Carson
  

• Frank O'Brien & Co. (1871)
  Frank O'Brien & Co.
  102 5th Ave ex
  

• J D O'Brien (1885)
  J D O'Brien
  15 Market
  

• John A O'Brien (1914)
  John A O'Brien
  1371 Lincoln Ave
  

• J F O'Brine (1908)
  J F O'Brine
  2537 5 th Ave
  

• Mathias Ochner (1871-1874)
  Mathias Ochner (1871-1872), Mrs. R Ochner (1874)
  743 Penn (1871), 751 Penn (1874)
  

• John O'Conner & Son (1874-1918)
  John O'Conner (1874-1890), John O'Conne(o)r & Sons (1892-1893), John O'Connor & Son (1894-1911), John O'Connor & Sons Co. (1912), Edmo(u)nd G O'Connor (1913, 1916-1918), John O'Connor & Sons (1914-1915)
  1814 Carson, s s
  

• John O'Connell (1911)
  John O'Connell
  5106 Penn Ave
  

• O'Conner & Stern (1874-1876)
  O'Conner & Stern
  10 Diamond Sq.
  

• Jas J O'Conner (1908)
  Jas J O'Conner
  1226 Penn Ave
  

• John O'Connor (1870)
  John O'Connor
  103-104 Water
  

• John O'Doherty (1879-1917)
  John O'Doherty (1879-1880), John O'Doherty & Co. (1881-1886), John O'Doherty & Co. Ltd (1887-1890), O'Dougherty & Co. Ltd. (1892-1903), O'Dougherty & Co. (1904-1917)
  Water & Penn Ave (1879), 17-18 Water (1880-1903), 325-327 Liberty Ave (1904-1912), 422 Penn Ave (1913-1917)
  

• H O'Donnell & Co. (1874-1890)
  H O'Donnell & Co. (1874), J J O'Donnell (1879), Edward O'Donnell (1890)
  2nd Ave, 23rd Ward (1874), 2 nd Ave ab Soho (1879), 1372 2 nd Ave (1890)
  

• Patrick M O'Donnell (1905-1918)
  Patrick M O'Donnell (1905-1913), Thos. F O'Donnell Co. (1914-1918)
  6006 Center Ave
  

• James J O'Donnell (1907-1916)
  James J O'Donnell (1907-1909, 1915-1916), John J O'Donnell (1914)
  716-718 Carson (1907-1909, 1912-1916), 822 Carson (1911)
  

• J L O'Donnell (1908)
  J L O'Donnell
  1830 W Liberty
  

• Henry C Oerman (1908-1918)
  Henry C Oerman (1908), Henry C Oermann (1912-1918)
  813 Spring Garden (1908), 812 East (1912-1918)
  

• M Offenberg (1907)
  M Offenberg
  108 Diamond
  

• J O'Keefe (1877)
  J O'Keefe
  715 Penn Ave
  

• Olliffe Bros. (1914-1918)
  Olliffe Bros.
  1618 Beaver Ave
  

• Edward L O'Malley (1890)
  Edward L O'Malley
  5 W Carson
  

• Henry Ommert (1884)
  Henry Ommert
  new 1614 Penn Ave
  

• David Oppenheim (1890)
  David Oppenheim
  27 Magee
  

• Charles P Orvis (1876)
  Charles P Orvis
  120 Smithfield
  

• Nathan Osgood
  Nathan Osgood
  112 Fullerton
  

• David S Osgood (1890)
  David S Osgood
  305 5 th Ave
  

• August Ostermaier (1907-1911)
  August Ostermaier
  4707 Liberty
  

• A Overholt & Co. (1878-1918)
  A Overholt & Co.
  104 5th Ave (1878), office cor 7th Ave & Smithfield (1880), 91 5 th Ave, Room 3 (1890), 121 3 rd Ave, Room 503 (1892-1895), Ferguson block Room 503 (1896-1901), Frick Building 1008-1010 (1902-1918)

last updated: October 15, 2009                  

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