| U. S. Navy, Farragut, ID |
303 |
| Unaka Lumber Co., Acton, SC |
X350 |
| Union City Logging Co., Union, WA |
900 |
| Union City Lumber Co. No. 1, Rothwell, KY |
X42 |
| Union City Lumber Co. No. 2, Rothwell, KY |
X43 |
| Union Freight Railroad No. 1, later No. 9, Boston, MA |
1646 |
| Union Freight Railroad No. 4, later No. 10, Boston, MA |
1682 |
| Union Freight Railroad No. 7, later No. 11, Boston, MA |
1664 |
| Union Freight Railroad No. 8, Boston, MA |
1617 |
| Union Lumber Co. No. 391, Lacey, WA |
391 |
| Union Lumber Co., Bloomfield, OH |
X8 |
| Union Machinery & Supply Co. (D), Seattle, WA |
189 |
| Union Machinery & Supply Co. (D), Seattle, WA |
381 |
| Union Machinery & Supply Co. (D), Seattle, WA |
672 |
| Union Machinery & Supply Co. (D), Seattle, WA |
674 |
