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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 = '68') ORDER BY date ASC, patent, type

Total of 3 patents found where: Class is '65'; Subclass is '68';

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T / S Patent Date Description Patentee Category Assigned To
 1871
U Specimen known 113,393 April 4, 1871 Improvement in the Mode of Making Telegraph Insulators
Press for making insulators leaving plunger in insulator		 BROOKFIELD, William
 Press  
 1880
R Specimen known 9,392 September 28, 1880 Mode of Forming Insulators
Press for forming insulator and threaded pinhole (reissue of 103,555)		 BROOKFIELD, James M.
 Press  
 1905
U 807,459 December 19, 1905 Process of Forming Glass Articles
Threading process using fusible metal to form threads in glass before it melts		 HARLOE, Morton
 Threads 1/3 to Harry P. Decker

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