US Patent: 906,902
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| Speed-change gear
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Patentee:
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| George O. Leopold (exact or similar names) - Philadelphia, PA |
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Patent Dates:
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| Applied: |
Jan. 22, 1908 |
| Granted: |
Dec. 15, 1908 |
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Patent Pictures:
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Leopold 906,902 |
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George Langford
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Description: |
| The competition heats up as North Brothers enters the 20th century with novel approaches to the breast drill. The mechanisms on the North Bros. breast drills are still considered the best by many. |
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