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