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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 = '338') ORDER BY date ASC, patent, type

Total of 2 patents found where: Class is '403'; Subclass is '338';

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T / S Patent Date Description Patentee Category Assigned To
 1868
U 74,406 February 11, 1868 Improvement in Lightning Rods
Lightning rod made with twists and folds
MUNSON, David
Lightning Rod  
 1921
U 1,393,330 October 11, 1921 Electrical Insulator
Links for Hewlett suspension disks (see 1,110,934)
WELCH, Walter J.
TRACY, Atlee H.
Suspension H. M. Byllesby & Co.

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