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| Patents for Leslie David Janell | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-101,064 | Sep. 18, 1906 | S.J. Gonya, P.B. Clark, A.E. Stearns, L.D. Janell | Machine a Poinconnage et Rognage | metal punching machines | |
| FR-376,238 | Aug. 03, 1907 | L.D. Janell | Punching-Shearing Machine | metal punching machines | |
| GB-190,702,953 | Aug. 22, 1907 | L.D. Janell | Improvements in Punching and Shearing Machines | metal punching machines | |