US Patent: 1,681,797
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| Alloy Steel
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Patentee:
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| Henry B. Allen (exact or similar names) - Philadelphia, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 27, 1925 |
| Granted: |
Aug. 21, 1928 |
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Russ Allen.
"Vintage Machinery" entry for Henry Disston & Sons
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Description: |
| High carbon steel (.55 to 1.00 percent) utilizing only nickel and molybdenum which once heat treated is particularly adapted for cutting tools. |
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