O'Leary Kenneth P.
O'Neill John
O'Keefe Dennis G.
O'meara David L.
Oak Frequency
Odorcic Kresimir
Oestreich William A.
Offermann Paul F.
Offir Yigal
Ogle Lyle
Oh Chang Hun
Ohara Takuo
Ohashi Yasuyoshi
Ohata Mitsunori
Ohhara Nobuhiro
Ohishi Yasuo
Ohizumi MFG. Co., Ltd.
Ohlandt John
Ohlandt, Greeley, Ruggiero & Perle.
Ohsaki Hiroyuki