Ohmi Atushi
Ohno Masaaki
Ohomi Atsushi
Ohota Kojiro
Ohrberg Carl V.
Ohrberg Carl Verner
Ohshima Kazumi
Ohta Masaji
Ohyagi Toshio
Oilquick AB
Okpokowuruk Paul
Okuda Shiro
Okuno Tsuyoshi
Oliostip S.p.A.
Olmsted Peter B.
Olofsson Bertil R.
Olsbergs Hydraulic AB
Olsen Carl Ivar
Olsgaard Orin J.
Olson Andrew M.