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| Patents for John E. Zimmermann | |||||
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| Number | Date | Patentee | Title | Type | |
| 715,729 | Dec. 09, 1902 | J.E. Zimmermann | Sheet-metal jack-spool | ||
| 788,185 | Apr. 25, 1905 | R.H. Bowen | Sheet-metal pulley | industrial machine pulleys and belt drive mechanisms | |