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| Patents for Harry J. Tapper | |||||
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| Number | Date | Patentee | Title | Type | |
| D115,882 | Jul. 25, 1939 | G.F. Morrison, H.J. Tapper | Design for a typographical trimming machine | printer | |
| 2,195,557 | Apr. 02, 1940 | H.J. Tapper, F.W. Billker | Angle gauge | printer | |
| 2,224,335 | Dec. 10, 1940 | H.J. Tapper, F.W. Billker | Slug resurfacer | printer | |