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| Patents for L. B. Keiper | |||||
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| Number | Date | Patentee | Title | Type | |
| 316,789 | Apr. 28, 1885 | H.B. Keiper | Device for Converting Motion | metalworking machine mechanisms | |
| 767,282 | Aug. 09, 1904 | H.B. Keiper | Drilling-machine | drill presses | |
| 874,893 | Dec. 24, 1907 | H.B. Keiper | Tuyère | forging machines | |