| O. K. Railroad No. 1, Clifton, OR |
445 |
| Oakland Bay Logging Co., Shelton, WA |
916 |
| Oakwood Lumber Co. No. 1, Pickens, WV |
1286 |
| Oakwood Lumber Co. No. 3, Pickens, WV |
X211 |
| Oakwood Lumber Co. No. 4, Pickens, WV |
X212 |
| Oakwood Lumber Co. No. 5, Pickens, WV |
X341 |
| OConnell, M. T. - No. 1, Rainier, OR |
648
(2nd) |
| Offutt, M. N. - Lumber Co., Huntington, WV |
X508 |
| Ohio Match Co. No. 3, Hayden Lake, ID |
303 |
| Ohio Timber Co. No. 1, Seattle, WA |
504 |
| Ohiopyle Lumber Co., Ohiopyle, PA |
X256 |
| Old Mission Portland Cement Co., San Juan, CA |
1205 |
| Olds, Fred C., Crosby, PA |
X203 |
| Olds, M. D. - Lumber Co. No. 1, Birch, MI |
1359 |
| Olds, M. D. - Lumber Co., Birch, MI |
X142 |
| Olean Chemical Co., Kragon, KY |
X106 |
| Olsen Brothers, Seaside, OR |
X431 |
| Olson Brothers Logging Co., Seaside, OR |
421 |
| Omaha Lumber Co., Fraser, CO |
684 |
| ONeil, Henry, Lucinda, PA |
X27 |
| Oostanaula Mining Co. No. 1, Calhoun, GA |
762 |
| Oregon Lumber Co. No. 105, Baker, OR |
1533 |
| Oregon Lumber Co., Baker, OR |
1085 |
| Oregon Timber & Lumber Co. No. 4, Clifton, OR |
1163 |
| Oregon Timber & Lumber Co. No. 5, Clifton, OR |
1221 |
| Osburn, W. O. - Lumber Co., Rib Lake, WI |
X282 |
| Osceola Silica Fire Brick Co. No. 1035, Osceola, PA |
1035 |
| Oso Logging Co. No. 1, Oso, WA |
658 |
| Oso Logging Co. No. 902, Oso, WA |
902 |
| Ostrander Railway & Timber Co. No. 348, Ostrander, WA |
642 |
| Owens Brothers Lumber Co., Mapleton, OR |
692 |
| Owens Logging Co. Ltd. No. 1, Green Bay, BC |
1491 |
| Owens Logging Co. Ltd. No. 2, Green Bay, BC |
1511 |
| Owens Logging Co., Olney, OR |
1019 |
| Owingsville & Olympia Railroad, Owingsville, KY |
X76 |
