- Barbour Chemical Works (oakland)
- California Cotton Mills (oakland)
- Carnegie Brick and Pottery Company (oakland)
- Cole's Pure Honey Company (oakland)
- Eagle Box and Manufacturing Company (oakland)
- Ettore Products Company (oakland)
- James A. Martin (powhatan)
- Judson Manufacturing Company (oakland)
- Lucasey Manufacturing Corporation (oakland)
- Marchant Calculating Machine Company (oakland)
- Mercantile Box Company (oakland)
- Pacific Tank and Pipe Company (oakland)