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| All Patents in class 73/379.04 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 423,702 | Mar. 18, 1890 | A.H. Roovers, A.W. Roovers | Coin operated power or strength testing machine | |
 | 434,608 | Aug. 19, 1890 | A.H. Roovers, A.W. Roovers | Coin controlled strength testing machine | |
| 2,224,060 | Dec. 03, 1940 | J.C. Moore | Game apparatus | ||