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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 = '501') AND (category.subclass = '61') ORDER BY date ASC, patent, type

Total of 2 patents found where: Class is '501'; Subclass is '61';

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T / S Patent Date Description Patentee Category Assigned To
 1923
U 1,449,793 March 27, 1923 Glass and Process of Making Same
Boro-silicate glass made colorless by adding neodymium oxide		 TAYLOR, William C.
 Boron Corning Glass Works
 1950
U 2,513,958 July 4, 1950 Electric Insulating Bushing and Glass Therefore
Glass capacitor bushing and improved seal with metal parts		 OMLEY, Herbert A.
 Bushing General Electric Co.

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