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| Patents for John Riddell | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 859,336 | Jul. 09, 1907 | J. Riddell | Double Acting Tool for Planers and Shapers | |
| 873,089 | Dec. 10, 1907 | J. Riddell | Tool for Cutting Turbine Buckets | ||