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| Patents for J. E. Chapman | |||||
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| Number | Date | Patentee | Title | Type | |
| 468,911 | Feb. 16, 1892 | G.L. Holt | Ratchet brace | ratchet braces | |
| 479,807 | Aug. 02, 1892 | E.L. Holcomb | Micrometer Calipers | micrometers | |
| 573,682 | Dec. 22, 1896 | W.M. Morton | Spirit-Level and Plumb | level adjustments | |