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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 = '52') AND (category.subclass = '316') ORDER BY date ASC, patent, type

Total of 2 patents found where: Class is '52'; Subclass is '316';

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T / S Patent Date Description Patentee Category Assigned To
D 114,085 April 4, 1939 Design for a Hollow Glass Building Block
Curved corner glass block with wide bars on exterior
LOCKART, Edward P.
OI Owens-Illinois Glass Co.
D 115,432 June 27, 1939 Design for a Hollow Glass Building Block
Square block design with quarter circle concave ridges
OI Owens-Illinois Glass Co.

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