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| Patents for Herbert John Haddan | |||||
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| Number | Date | Patentee | Title | Type | |
| GB-187,803,666 | Sep. 17, 1878 | H.J. Haddan, W.L. Lay | Tongs or Pliers | pipe tongs | |
| GB-188,304,477 | Sep. 19, 1883 | H.J. Haddan, H. Port | Spanner; Combination Hand Tools; Vices | wrench handle components | |
| GB-188,400,373 | Jan. 02, 1884 | H.J. Haddan, A.E. Lytle | Combination Tools | combination tools | |