US Patent: 2,602,475
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| Reciprocative electromagnetic tool
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Patentees:
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| Hobart D. Andreae (exact or similar names) - Birmingham, MI |
| Maynard R. Andreae (exact or similar names) - Birmingham, MI |
| Wayne A. Andreae (exact or similar names) - Birmingham, MI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Sep. 17, 1947 |
| Granted: |
Jul. 08, 1952 |
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Jeff Joslin
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Description: |
| This is an improvement to patent 1,948,229. |
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