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| All Patents in class 188/301 | |||||
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| Number | Date | Patentee | Title | Type | |
| 337,644 | Mar. 09, 1886 | J. Young | Dash-pot for steam-engines | steam engine valve gear | |
| 929,008 | Jul. 27, 1909 | F. Phillips | Dash-pot | ||
| 1,609,437 | Dec. 07, 1926 | E.B. Stimpson | Shock-absorbing and noise-eliminating device | riveting machines | |