US Patent: 745,758
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| Slotting Machine Tool Holder
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Patentees:
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| John Armstrong (exact or similar names) - Chicago, Cook County, IL |
| Samuel Welter (exact or similar names) - Chicago, Cook County, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 29, 1903 |
| Granted: |
Dec. 01, 1903 |
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Joel Havens Armstrong Brothers Tool Co. history "Vintage Machinery" entry for Armstrong Brothers Tool Co.
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Description: |
| Louis K. Gillson - patent attorney
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