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| All Patents in class 137/561R | |||||
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| Number | Date | Patentee | Title | Type | |
| 727,466 | May 05, 1903 | E.J. Sederholm | Governor | steam engine governors | |
| 2,224,377 | Dec. 10, 1940 | G.H. Clark | Refrigerating Apparatus | refrigeration apparatus | |
| 2,432,859 | Dec. 16, 1947 | F.Y. Carter | Refrigerant Flow Controlling Means | flow controls | |
| 2,743,903 | May 01, 1956 | M.B. Lucker | Automobile jack | automobile and truck jacks | |