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| Patents for Harry T. Parker | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,846,749 | Feb. 23, 1932 | H.T. Parker | Mortising machine | mortising machines | |
| 1,879,454 | Sep. 27, 1932 | H.T. Parker | Mortising Tool | butt gauges | |