SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN category ON category.patent = patent.patent AND category.type = patent.type WHERE (category.class = 'D14') ORDER BY date ASC, patent, type |
Total of 1 patents found where: Class is 'D14';
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T / S | Patent | Date | Description | Patentee | Category | Assigned To |
1938 | ||||||
U | 2,135,344 | November 1, 1938 | Transposed Lead-In Transposition for radio line |
JOHNSTON, Fred E. |
Transposition | Crosley Radio Corp. |
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