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| Patents for Joseph H. Lawles | |||||
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| Number | Date | Patentee | Title | Type | |
| 427,477 | May 06, 1890 | J.H. Lawles | Machine for Grinding Pearls Ivory Etc | material grinding machines | |
| 477,130 | Jun. 14, 1892 | J.H. Lawles | Machine for Turning Patterns in Pearl Ivory or Other Substances | button making machinery | |