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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 = '428') ORDER BY date ASC, patent, type

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

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T / S Patent Date Description Patentee Category Assigned To
 1964
U 3,127,278 March 31, 1964 Low-Melting Glass Sealant and Article Made Therefrom
Welding of glass block and TV Tube parts		 FRANCEL, Josef
HAGEDORN, Erwin C.
 OI Owens-Illinois Glass Co.

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