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| Patents for Hallen Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,253,351 | Mar. 03, 1981 | H. Allen | Cork extractor | lever cork extractors | |
| 4,291,597 | Sep. 29, 1981 | H. Allen | Cork extractor | self and partial cork pullers | |
| 4,377,096 | Mar. 22, 1983 | H. Allen | Cork extractor | self and partial cork pullers | |
| 4,703,673 | Nov. 03, 1987 | H. Allen | Cork-extracting apparatus | self and partial cork pullers | |