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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 = '69') ORDER BY date ASC, patent, type

Total of 3 patents found where: Class is '65'; Subclass is '69';

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T / S Patent Date Description Patentee Category Assigned To
 1885
U Specimen known 324,157 August 11, 1885 Method of Forming Screw Threads on Glass
Threads formed in glass (plunger remains in glass during annealing)		 PENNYCUICK, James G.
 Thread  
 1906
U 836,298 November 20, 1906 Process of Making Glass Insulators or Other Glass Articles
Process covering patent 836,297: press, fully automatic operation, measuring molten glass to annealing		 BROOKFIELD, Henry M.
 Press  
 1961
U 2,972,211 February 21, 1961 Method of Manufacturing a Glass Insulator
Method of tempering glass insulators where the head is toughened more than the rest of the insulator		 JELLYMAN, Philip E.
MACINTOSH, Hamish Fraser
WILCOCK, John E.
 Glass Pilkington Brothers Ltd.

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