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| Patents for Wilfred W. Roovers | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 372,441 | Nov. 01, 1887 | W.W. Roovers, P.G. Williams | Coin operated induction coil | |
 | 384,010 | Jun. 05, 1888 | W.W. Roovers, P.G. Williams | Cash drawer | |
 | RE10,949 | Jul. 24, 1888 | W.W. Roovers, P.G. Williams | Coin Operated Induction Coil | |
 | 403,978 | May 28, 1889 | W.W. Roovers, P.G. Williams | Coin released spirometer | |
 | 491,971 | Feb. 14, 1893 | W.W. Roovers, P.G. Williams | Coin controlled dice throwing machine | |