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| Patents for A. C. Ratigan | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 741,292 | Oct. 13, 1903 | R.W. Bailey | Fine Adjustment for Protractors | |
 | 783,721 | Feb. 28, 1905 | E.C. Clapp | Micrometer Gage | |
 | 808,388 | Dec. 26, 1905 | W. Lahey | Lubricating journal-bearings | |
 | 827,904 | Aug. 07, 1906 | J. Boyle | Igniter for explosive-engines | |
 | 861,283 | Jul. 30, 1907 | H.J. Hjorth | Wire Winding Tool | |
| 989,261 | Apr. 11, 1911 | H.J. Hjorth | End Thrust Adjustment for Machine Spindles | ||