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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 = '121') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '403'; Subclass is '121';

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T / S Patent Date Description Patentee Category Assigned To
 1953
U 2,625,581 January 13, 1953 Guy Insulator
Heavy duty guy strain insulator		 JENNER, Ralph L.
FIERO, Carl D.
 Strain Lapp Insulator Co., Inc.

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