US Patent: 1,401,585
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| Spark Plug
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Patentees:
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| Archie F. Collins (exact or similar names) - Congers, Rockland County, NY |
| Virgil D. Collins (exact or similar names) - Congers, Rockland County, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jun. 17, 1919 |
| Granted: |
Dec. 27, 1921 |
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Joel Havens
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