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| Patents for Albert T. Lehman | |||||
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| Number | Date | Patentee | Title | Type | |
| 977,060 | Nov. 29, 1910 | F. Welker | Grinding-machine | cutter grinding | |
| 1,028,923 | Jun. 11, 1912 | F. Welker | Self-adjusting clamp-bar for door and furniture clamps | clamps | |