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| Patents for Riley Herbert Parker | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,307,451 | Jun. 24, 1919 | R.H. Parker | Screw Thread Gage | measuring tools | |
| 1,353,608 | Sep. 21, 1920 | R.H. Parker | Scew Thread Gage | measurement gauges | |