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| Patents for James Hartas Headley | |||||
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| Number | Date | Patentee | Title | Type | |
| GB-185,602,956 | Dec. 12, 1856 | J.H. Headley | Improved mode of manufacturing artificial granite in various forms, and plating or veneering the same with marble, so as to present an exterior of Marble and an interior of stone or granite" | ||
| NS-30 | Jun. 30, 1857 | J.H. Headley | Artificial granite | ||