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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 = '74') AND (category.subclass = '97.1') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '74'; Subclass is '97.1';

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T / S Patent Date Description Patentee Category Assigned To
 1888
U 391,512 October 23, 1888 Electric Switch
Wooden switch (Brown p. 21)		 CLEVELAND, William B.
 Wood  

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