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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 = '403') AND (category.subclass = '340') ORDER BY date ASC, patent, type

Total of 3 patents found where: Class is '403'; Subclass is '340';

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T / S Patent Date Description Patentee Category Assigned To
U 120,251 October 24, 1871 Improvement in Lightning Rod Couplings
Lightning rods with interconnecting couplings
Lightning Rod Coupling  
U 266,075 October 17, 1882 Lightning Rod Joint or Coupling
Internal coupling for hollow lightning rods that can be pinned to the rod
BALL, Charles E.
Lightning Rod Coupling  
U 278,028 May 22, 1883 Lightning Rod
Method of connecting flanged or ribbed lightning rods
LOBDELL, Augustus C.
Lightning Rod Coupling  

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