| 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 = '174') AND (category.subclass = '4C') ORDER BY category ASC, date, patent, type |
Total of 2 patents found where: Class is '174'; Subclass is '4C';
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| T / S | Patent | Date | Description | Patentee | Category | Assigned To |
| Lightning Rod | ||||||
| U | 2,644,026 | June 30, 1953 | Radioactive Lightning Protector with Accelerating Elements Lightning rod with porcelain disk coated with radioactive material |
GRENIER, Joseph Pierre LESCIEUX, Pierre Edouard Eugene |
Lightning Rod | Ste. Helita |
| U | 2,815,395 | December 3, 1957 | Radioactive Lightning Protector Lightning rod with a porcelain insulator just below the point with bands of radioactive material on its surface and a much larger hollow metal spoked ring below with bands of radioative material on the surface |
DONELLI, Benedetto Luigi |
Lightning Rod | |
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