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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 = '248') AND (category.subclass = '228.4') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '248'; Subclass is '228.4';

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T / S Patent Date Description Patentee Category Assigned To
U 1,027,712 May 28, 1912 Insulator Supporting Device
Metal pin to clamp around metal crossarm with hinged side part
ETTE, Charles G.
Pin Ette Investment Co.

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