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| All Patents in class 33/23.11 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,282,473 | May 12, 1942 | J.A. Hoffmann | Copy character holder | metal engraving machines | |
| 2,766,003 | Oct. 09, 1956 | A.H. Dall, H. Fritschi | Tracer Head Mechanism | profiling machines | |
| 2,777,201 | Jan. 15, 1957 | T.A. Wetzel | Pattern Support and Adjustable Template | milling machines | |