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| All Patents in class 248/674 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,638,086 | Aug. 09, 1927 | R.L. Carter | Adjustable support for routing machines | handheld power tool accessories | |
| 2,998,215 | Aug. 29, 1961 | S.S. Brown | Motorized adjustable hospital bed | ||
| 5,042,345 | Aug. 27, 1991 | P.F. Hawkins, L.F. Wagoner | Shearing machine | metal shearing machines | |