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| All Patents in class 165/169 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 8,221X | May 26, 1834 | J. Root | Condenser | ||
| 4,516,044 | May 07, 1985 | K.F. Bone | Heat Exchange Apparatus for Electric Motor and Electric Motor Equipped Therewith | ||