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| Patents for P. W. J. Lander | |||||
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| Number | Date | Patentee | Title | Type | |
| 710,700 | Oct. 07, 1902 | J. Lund | Boring Implement | hollow bits | |
| 773,735 | Nov. 01, 1904 | T.H. Griffitts | Power Hammer | power hammers | |