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| Patents for Leslie S. Hall | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,655,542 | Jan. 10, 1928 | L.S. Hall | Die head for threading machines and the like | pipe threading machines | |
| 1,666,135 | Apr. 17, 1928 | L.S. Hall | Belt-tensioning device for threading machines and the like | pipe threading machines | |
| 1,673,979 | Jun. 19, 1928 | L.S. Hall | Cutting off and reaming attachment for threading machines and the like | pipe threading machines | |