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| All Patents in class 432/225 | |||||
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| Number | Date | Patentee | Title | Type | |
| 151,167 | May 19, 1874 | G.F. Simonds | Improvement in Tempering Ovens for Steel and Iron | tool making machines | |
| 157,296 | Dec. 01, 1874 | C. Richardson | Improvement in Flattening and Tempering Saws | handsaws | |
| 169,736 | Nov. 09, 1875 | G.F. Simonds | Improvement in Tempering and Forming Articles of Steel | tool making machines | |
| 343,358 | Jun. 08, 1886 | W.B. Barry | Apparatus for tempering saws | tool making machines | |