US Patent: 1,971,230
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| Thread cutting die
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Patentee:
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| Luben Nikoloff (exact or similar names) - Boston, MA |
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Patent Dates:
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| Applied: |
Oct. 15, 1930 |
| Granted: |
Aug. 21, 1934 |
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Patent Pictures:
[
1 | 2
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Russ Allen
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Description: |
| Martin Donnelly had a pair of similar die stocks in one of his auctions. Martin's comments:Two mechanically complex die stocks marked with 1933 and 1934 patent dates. Both were undoubtedly produced by the same inventor and differ in form--a likely result of the observation of the shortcomings of the 1933 version
I'm assuming the years should have been 1934 and 1935 and that the other patent is 1,988,046. |
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