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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 = '310') AND (category.subclass = '308') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '310'; Subclass is '308';

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T / S Patent Date Description Patentee Category Assigned To
 1889
U 414,943 November 12, 1889 Method of Utilizing Natural Electric Energy
Method of capturing electric energy from lightning rods and storing in a battery		 DEWEY, Mark W.
 Lightning Energy The Dewey Corp.

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