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| Patents for R. M. Kelly | |||||
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| Number | Date | Patentee | Title | Type | |
| 715,729 | Dec. 09, 1902 | J.E. Zimmermann | Sheet-metal jack-spool | ||
| 757,088 | Apr. 12, 1904 | C.A. Brinley | Sheet-metal pulley | industrial machine pulleys and belt drive mechanisms | |
| 774,347 | Nov. 08, 1904 | R.H. Bowen | Sheet-metal pulley | industrial machine pulleys and belt drive mechanisms | |