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| Patents for Lancaster P. Clark | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,015,382 | Jan. 23, 1912 | E.W. Duston | Cutting-off and carrying mechanism for heading-machines | ||
| 1,026,082 | May 14, 1912 | E.W. Duston | Heading mechanism | ||
| 1,026,083 | May 14, 1912 | E.W. Duston | Machine for feeding headed blanks | ||
| 1,104,029 | Jul. 21, 1914 | K. Weiss | Machine for feeding headed blanks | ||
| 1,111,833 | Sep. 29, 1914 | F.C. Hoffman | Nut-tapping machine | ||