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| Patents for Charles L. Griswold | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 14,561 | Apr. 01, 1856 | G.G. Griswold | Method of Manufacturing Augers | |
 | 47,946 | May 30, 1865 | C.L. Griswold | Improvement in Augers | |
 | 133,440 | Nov. 26, 1872 | C.L. Griswold | Improvement in Gimlets | |
 | 143,142 | Sep. 23, 1873 | C.L. Griswold | Improvement in Gimlet-Handles | |
 | 208,168 | Sep. 17, 1878 | C.L. Griswold | Bit-stock | |
 | 302,331 | Jul. 22, 1884 | C.L. Griswold | Corkscrew | |