Ohrberg George E.
Oil Mallee Company of Australia
Oji Koichi
Okamura Issaku
Okma Oberkochener Maschinen GmbH
Okoma Maschinenfabrik GmbH
Okoma Oberkochener Machinen GmbH
Oksanen Hannu
Oldenburg Dorrance
Oledal Bo J. M.
Oledal Jan
Olin C. Howard
Oliver David P.
Oliver Design Specialties Ltd.
Oller Jaime M.
Olofsson Anders
Onda Hirotsuga
Onda Hirotsugu
Onda Kojiro
Onda Ironworks Company, Limited