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| All Patents in class 248/300 | |||||
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| Number | Date | Patentee | Title | Type | |
| 939,368 | Nov. 09, 1909 | W. Withem | Boiler Bracket | stationary boilers | |
| 1,800,572 | Apr. 14, 1931 | N.C. Simonsen | Mounting for oil gauges and the like | ||