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| All Patents in class 81/444 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 544,606 | Aug. 13, 1895 | J.R. Balsley | Screw Holder and Driver | |
 | 595,859 | Dec. 21, 1897 | F.B. Miller | Screw holding screwdriver | |
 | 1,360,368 | Nov. 30, 1920 | G.N. Coburn | Screw holding screwdriver | |