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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 = '425') AND (category.subclass = 'DIG23') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '425'; Subclass is 'DIG23';

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T / S Patent Date Description Patentee Category Assigned To
 1962
U 3,026,575 March 27, 1962 Skylight Structure and Method of Fabrication
Sklight made of glass blocks		 LUSHER, Kenneth G.
MCDAVITT, Murray
VINCENT, Harvard B.
 OI Owens-Illinois Glass Co.

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