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| Patents for George Langstaff | |||||
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| Number | Date | Patentee | Title | Type | |
| 81,673 | Sep. 01, 1868 | J. Orm | Improvement in circular-saw mills | circular sawmills | |
| 92,466 | Jul. 13, 1869 | J. Orm | Improvement in circular-saw mills | circular sawmills | |
| 189,379 | Apr. 10, 1877 | J. Orm | Improvement in log-turners for saw-mills | sawmill accessories | |