US Patent: 3,874,810
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| Drill guide
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Patentee:
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| William D. Russell (exact or similar names) - Chula Vista, CA |
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Patent Dates:
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| Applied: |
Jun. 21, 1973 |
| Granted: |
Apr. 01, 1975 |
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Jeff Joslin
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Description: |
| The USPTO patent summary describes it as "A rugged, versatile drill guide of simple design for positioning a drill bit relative to varied workpiece configurations." The Portalign drill guide was manufactured for many years and was sold under Sears' Craftsman brand as their "Portalign precision drill guide". The originals are no longer made but imitations are still readily available, though of variable quality. |
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