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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 = '198') AND (category.subclass = '468.2') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '198'; Subclass is '468.2';

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T / S Patent Date Description Patentee Category Assigned To
 1941
U 2,259,728 October 21, 1941 Apparatus for Making Hollow Glass Building Blocks
Machine for making glass block		 BRIDGES, Donald A.
 OI Owens-Illinois Glass Co.

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