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| All Patents in class 221/11 | |||||
| Number | Date | Patentee | Title | Type | |
| 2,906,072 | Sep. 29, 1959 | E.C. Carlson | Can Cover Feed | metalworking machine mechanisms | |
| 3,118,332 | Jan. 21, 1964 | G.W. Ross, R.F. Fischer, A.H. Fotsch | Machine Tool | multiple station machines | |