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| All Patents in class 81/456 | |||||
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| Number | Date | Patentee | Title | Type | |
| 455,101 | Jun. 30, 1891 | E.C. Heydenreich | Tool Holder | tool holders | |
| 466,220 | Dec. 29, 1891 | T.H. Buffington | Screw Driver | screwdrivers | |
| 685,606 | Oct. 29, 1901 | A. Henry | Specialty Screw Driver | screwdrivers | |
| 1,783,070 | Nov. 25, 1930 | F.R. Bergmann | Screw holding screwdriver | screwdriver blades | |
| 2,796,099 | Jun. 18, 1957 | H.E. Dierker | Screw Holding Screwdriver | screwdriver blades | |