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| Patents for Joseph Friedl | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,767,752 | Jun. 24, 1930 | J. Friedl | Feed mechanism for drilling machines | drill presses | |
| 1,905,560 | Apr. 25, 1933 | J. Friedl | Drilling machine | drill presses | |