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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 = '65') AND (category.subclass = 'DIG4') ORDER BY date ASC, patent, type

Total of 2 patents found where: Class is '65'; Subclass is 'DIG4';

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T / S Patent Date Description Patentee Category Assigned To
 1954
U 2,680,332 June 8, 1954 Welding Glass Parts
Method of welding glass block and TV Tube halves together
YOUNG, Norton S.
OI Owens-Illinois Glass Co.
 1963
U 3,089,051 May 7, 1963 Catadioptric Electroluminescent Glass Block
Glass Block with internal illumination
VERES, Frank
OI Owens-Illinois Glass Co.

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