US Patent: 1,943,980
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| Spindle connecter
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Patentee:
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| Arthur William Mall (exact or similar names) - Chicago, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jun. 22, 1932 |
| Granted: |
Jan. 16, 1934 |
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Jeff Joslin
Vintage Machinery entry for Mall Tool Co.
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Description: |
| There is something curious about this patent: it was assigned to a Cleveland company, but the inventor had his own company that made handheld power tools, the Mall Tool Co. of Chicago. |
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