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| All Patents in class 116/141 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 186,718 | Jan. 30, 1877 | J. Einig | Improvement in steam-whistle | |
| 471,171 | Mar. 22, 1892 | H.R. Frisbie | Steam Whistle | ||
 | 520,418 | May 29, 1894 | H.R. Frisbie | Steam Chime Whistle | |
| 801,081 | Oct. 03, 1905 | J.T. Hoban | Steam-whistle | ||
 | 1,015,595 | Jan. 23, 1912 | W.E. Stephens | Automobile-horn | |
 | 1,036,023 | Aug. 20, 1912 | W.E. Stephens | Automobile-horn | |