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| Patents for Thomas Zimmerman | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,850,054 | Mar. 15, 1932 | T. Zimmerman, S.A. Strickland | Centerless Grinder | ||
| 1,851,265 | Mar. 29, 1932 | T. Zimmerman, S.A. Strickland | Feeding Mechanism for Grinders | ||