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Sir William Preece, chief engineer, British Post Office ; 1878
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| Number | Title | Issue Date |
| 4028193 | Coke oven door Construction of coke oven door which is characterized in that there is mounted an adiabatic layer on the inner surface of a base plate of a metallic door body in addition to conventional adiabatic door plug, the inner surface of the adiabatic layer being ... | 06/07/1977 |
| 3955232 | Coke oven cleaner The coke oven cleaner is capable of scraping particularly the entrance areas of a coke oven automatically to remove tar and the like adhered thereon completely, and comprises an upright stationary holding or support frame mounted on a door lifter, and a f... | 05/11/1976 |
