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| All Patents in class 33/384 | |||||
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| Number | Date | Patentee | Title | Type | |
| 883,642 | Mar. 31, 1908 | A.W. Hight | Spirit Level | levels | |
| 902,778 | Nov. 03, 1908 | J.A. Traut | Plumb-Level | level adjustments | |
| 948,232 | Feb. 01, 1910 | O.H. Lund | Level Attachment for Straight-Edges | level adjustments | |
| 966,321 | Aug. 02, 1910 | J.H. Dunstan | Combination Tool | combination saws | |
| 1,093,775 | Apr. 21, 1914 | A.K. Frantz | Adjustable Level Attachment | levels | |
| 1,212,735 | Jan. 16, 1917 | A.W. Ritter, C. Bodmer | Spirit-Level | levels | |
| 1,280,994 | Oct. 08, 1918 | . | Combination Tool | ||