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| Patents for James Howden & Co., Ltd. | |||||
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| Number | Date | Patentee | Title | Type | |
| GB-186,200,034 | Jan. 04, 1862 | J. Howden | Improvements in steam engines and boilers | steam engines | |
| GB-186,303,212 | Dec. 19, 1863 | J. Howden | Steam engines and boilers | steam engines | |