US Patent: 1,425,213
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| Drill chuck
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Patentee:
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| Carl A. Palmgren (exact or similar names) - Chicago, IL |
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Patent Dates:
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| Applied: |
Aug. 28, 1919 |
| Granted: |
Aug. 08, 1922 |
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Jeff Joslin
Vintage Machinery entry for Palmgren Steel Products, Inc.
Vintage Machinery entry for Steel Art Tool Co.
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Description: |
| We presume that this chuck was made by Steel Art Tool Co., as the inventor was known to have been working there in 1918 and they made drill chucks. |
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