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| Patents for John Parker | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,196,882 | Sep. 05, 1916 | J. Parker | Variable-speed gearing | metalworking machine mechanisms | |
| 1,196,883 | Sep. 05, 1916 | J. Parker | Variable-speed mechanism | metalworking machine mechanisms | |
| 1,295,363 | Feb. 25, 1919 | J. Parker | Indexing Center | ||
| 1,295,583 | Feb. 25, 1919 | J. Parker | Feeding Mechanism | ||