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| Patents for A. H. Spencer | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 303,994 | Aug. 26, 1884 | R. Holman, D.J. White, F.H. Foster | Spiral lathe | |
 | 518,106 | Apr. 10, 1894 | W.J. Johnson | Tool-Handle | |
 | D24,503 | Jul. 23, 1895 | L.S. Starrett | Try Square | |
 | 557,446 | Mar. 31, 1896 | L.S. Starrett | Speed Measure | |
 | D25,392 | Apr. 14, 1896 | L.S. Starrett | Design for a Plumb and Level Frame | |
 | 576,626 | Feb. 09, 1897 | L.S. Starrett | Hack Saw | |
 | 580,432 | Apr. 13, 1897 | L.S. Starrett | Speed Indicator | |
 | 601,800 | Apr. 05, 1898 | L.S. Starrett | Speed Indicator | |