US Patent: 5,426,860
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| Plumb bob assembly
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Patentees:
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| Thomas S. Gardiner (exact or similar names) - Ottawa, ON Canada |
| John S. Lynn (exact or similar names) - Ottawa, ON Canada |
| Leonard G. Lee (exact or similar names) - Ottawa, ON Canada |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jun. 22, 1994 |
| Granted: |
Jun. 27, 1995 |
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Russ Allen
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