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| Patents for Connecticut Tool & Engineering Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,392,957 | Oct. 11, 1921 | F.E. Matthews | Pulley and sheath therefor | ||
| D141,416 | May 29, 1945 | D.J. Williams, E.J. Tomek | Filing machine or the like | filing machines | |
| 2,454,235 | Nov. 16, 1948 | E.J. Tomek | Drilling machine | multiple spindle drill presses | |
| D156,859 | Jan. 10, 1950 | D.J. Williams | Filing machine or the like | filing machines | |
| 2,922,217 | Jan. 26, 1960 | F.J. Kriz | Filing machine | filing machines | |