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| Patents for Chester A. Hoefer | |||||
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| Number | Date | Patentee | Title | Type | |
| 955,334 | Apr. 19, 1910 | C.A. Hoefer | Valve Inserting Machine | valve inserting machines | |
| 1,164,813 | Dec. 21, 1915 | F.W. Hoefer, C.A. Hoefer | Multiple-spindle drill-head | wood drilling and boring | |
| 2,183,743 | Dec. 19, 1939 | C.A. Hoefer | Multiple Spindle Machine Tool | multiple spindle drill presses | |