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| All Patents in class 74/665R | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,248,441 | Jul. 08, 1941 | C. Shaw | Boring Head | boring heads | |
| 2,481,642 | Sep. 13, 1949 | C.A. Grunschel, C.S. Bohmer | Multiple Tool Head | drill press accessories | |
| 2,608,112 | Aug. 26, 1952 | A.P. Speckin | Adjustable multiple spindle head | multiple spindle drilling heads | |
| 2,884,818 | May 05, 1959 | J.R. Bashor, A.P. Speckin | Drill head | multiple spindle drilling heads | |
| 3,023,677 | Mar. 06, 1962 | A.S. Charlat | Machine Tool with Tool Carrier | milling machines | |