Obata Takeaki
Obayashi Hideki
Ober/Kaler c/o Royal W. Craig
Oberg Erik John
Oberg Hans-Joachim
Oberheide G. Clarke
Oberknapp Wolfgang
Oberleitner Nikolaus
Obermayer Alfred
Obermayer Bertram
Obermeier Karl-Heinz
Oberstadt Allan L.
Oberstadt Allan Lee
Oberth Hans
Obidi T. Yomi
Obital Engine Company (Australia) Pty Limited
Oblaender Kurt
Oblon, Spival, McClelland, Maier & Neustadt, P.C.
Obrist Engineering GmbH
Obuchi Yutaka