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| All Patents in class 55/315 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,868,519 | Jul. 26, 1932 | A.A. Breuer | Portable suction cleaner | |
 | 2,390,101 | Dec. 04, 1945 | J.P. Jason | Suction cleaning apparatus | |
 | 2,620,066 | Dec. 02, 1952 | H.L. Gilmore | Air cleaner | |