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| Patents for L. B. Middleton | |||||
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| Number | Date | Patentee | Title | Type | |
| 857,810 | Jun. 25, 1907 | G. Kohlhaas | Hole Micrometer | measurement gauges | |
| 1,265,277 | May 07, 1918 | W.H. Strickland | Saw Set | saw sets | |
| 1,266,249 | May 14, 1918 | W.E. Ginsberg | Tool Holder | metal lathes | |
| 1,276,274 | Aug. 20, 1918 | J. Shaffer | Adjustable Pipe Wrench | pipe tongs | |