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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 = '59') ORDER BY date ASC, patent, type

Total of 4 patents found where: Class is '501'; Subclass is '59';

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T / S Patent Date Description Patentee Category Assigned To
U 1,225,147 May 8, 1917 Insulator
Boro-silicate glass
LOCKE, Fred M.
U 1,529,259 March 10, 1925 Glass
Alumino-silicate glass (Corning's Flameware)
LOCKE, Fred M.
LOCKE, Fred J.
U 1,623,301 April 5, 1927 Heat Resisting Glass
Glass of nearly opaque nature, probably that used for Fry insulators
Glass H. C. Fry Glass Co.
U 1,923,221 August 22, 1933 Process of Melting Glass
Boro-silicate glass, method to make colorless by using graphite pot
LOCKE, Fred M.
LOCKE, Fred J.
Boron Corning Glass Works

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