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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 = '70') ORDER BY date ASC, patent, type

Total of 4 patents found where: Class is '501'; Subclass is '70';

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T / S Patent Date Description Patentee Category Assigned To
U 1,143,885 June 22, 1915 Process for Making a Compound of Glass
Glass made from cullet with large amount of lime added for toughness
U 1,886,280 November 1, 1932 Ultra Violet Ray Transmitting Glass and to a Batch and Method for Making the Same
Boro-silicate glass, method to make glass to transmit UV light
LOCKE, Fred M.
LOCKE, Fred J.
Boron Corning Glass Works
U Specimen known 2,157,100 May 9, 1939 Glazed Ceramic Insulator and the Like
Glaze - compression glaze
ROWLAND, Davidge H.
Glaze Locke Insulator Corp.
U 4,782,199 November 1, 1988 Insulators Having Improved Steep Wave Front Characteristics
Suspension, head treated with special glaze to strengthen cap/cement
SEIKE, Shoji
MIMA, Toshiyuki
Suspension NGK Insulators, Ltd.

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