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| Patents for Otto A. G. Specht | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,130,611 | Apr. 28, 1964 | O.A. Specht | Swaging Machine | metal swaging machines | |
| 3,222,912 | Dec. 14, 1965 | O.A. Specht | Swaging Machine with Adjustable Stroke | metal swaging machines | |