US Patent: 2,717,401
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| Device for Cutting Very Fine Screw Threads
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Patentees:
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| Alexander Charles George Menzies (exact or similar names) - Harrow-on-the-Hill, England |
| George Edwin Fensom (exact or similar names) - London, England |
| Walter Zehden (exact or similar names) - London, England |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jul. 05, 1951 |
| Granted: |
Sep. 13, 1955 |
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Joel Havens
"Vintage Machinery" entry for Hilger & Watts
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Description: |
| Claims priority, application in Great Britain, 18 Jul., 1950. |
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