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| All Patents in class 239/551 | |||||
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| Number | Date | Patentee | Title | Type | |
| 596,939 | Jan. 04, 1898 | W.H. Millspaugh | Cleansing apparatus for paper-making machines | ||
| 596,941 | Jan. 04, 1898 | W.H. Millspaugh | Cleansing apparatus for paper-making machines | ||
| 596,950 | Jan. 04, 1898 | J.M. Stratton | Cleansing apparatus for paper-making machines | ||
| 3,267,944 | Aug. 23, 1966 | G.B. Fox, T.B. Heckman, D.A. Meeker | Spray device for dishwashing apparatus | ||