O'Connell Philip J.
O'Mahony Gerard M.
O.T.H. Beier & Company (Proprietary) Limited
Oakley, Jr. Roy C.
Obata Yukio
Oberg Donald F.
Oberley Gene
Obermaier & Cie.
Ochsner Arnold
Officina Meccanica Biancalani & C. di Biancalani Fiorenzo & C.S.
Officine Minnetti di Ornella Raveggi & C.S.a.s.
Ogasahara Hitoshi
Ogata Kiichi
Oh Dong Y.
Oh Dong Yeop
Oh Hyun Soo
Oh Je Jun
Oh Ock-Hwan
Ohe Hirokazu
Ohshima Ichiro