Okoba Yasuyuki
Olean Power Technologies, Inc.
Olesen John Thomas
Oliver Sunit
Olle Larsson Construktion AB
Olson Chris F.
Olson Gregg
Olson Marvin
Oman Richard A.
Omata Shigehiko
Onimaru Sadahisa
Onodera Naoyuki
Onoyama Taiichi
Openhybro Group, Ltd.
Optiwind Corp
Orlikowski Michael T.
Ormat Turbines (1965) Ltd.
Ortega Isabel Alvarez
Ortiz Israel
Ortiz & Lopez