US Patent: 4,062,412
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| Flexible shaft drilling system
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Patentee:
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| William A. McIlvanie (exact or similar names) - Yakima, WA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 29, 1976 |
| Granted: |
Dec. 13, 1977 |
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Jeff Joslin
Vintage Machinery entry for McIlvanie Machine Works
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Description: |
| This drilling system is intended for coal mining. Given this patent's assignment, it seems likely that it was based on work funded by the United States Secretary of the Interior. The inventor was owner and manager of the McIlvanie Machine Works, makers of engine lathes, drill presses and key seaters. |
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