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| All Patents in class 180/68.6 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,132,483 | Oct. 11, 1938 | W.C. Klespe | Radiator construction | steam heating | |
| 2,966,339 | Dec. 27, 1960 | J.L. Morgan | Radiator protector device | ||