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| Patents for Irwin Auger Bit Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 306,907 | Oct. 21, 1884 | W.M. Dimitt | Auger Bit | drill bits | |
| 361,522 | Apr. 19, 1887 | C.H. Irwin | Auger Bit | drill bits | |
| 2,215,344 | Sep. 17, 1940 | A.P. Albrecht | Micro Dial | drill bits | |
| 2,589,500 | Mar. 18, 1952 | J.R. Thomson, R.K. Landon | Strait-Line | plumb bobs | |