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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 = '428') AND (category.subclass = '161') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '428'; Subclass is '161';

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T / S Patent Date Description Patentee Category Assigned To
 1958
U 2,835,623 May 20, 1958 Method of Forming a Unitary Panel of Glass Blocks
Pre-assembled glass block windows and skylight panels		 VINCENT, Harold B.
MCDAVITT, Murray
 OI Owens-Illinois Glass Co.

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