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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 = '251') ORDER BY date ASC, patent, type

Total of 3 patents found where: Class is '65'; Subclass is '251';

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T / S Patent Date Description Patentee Category Assigned To
 1899
U 622,270 April 4, 1899 Machine for Making Hollow Glassware
Glass Press that can be adapted for insulator manufacture		 ROWE, John T.
 Misc  
 1915
U 1,144,527 June 29, 1915 Mold
Press for making glass insulators		 BROOKFIELD, Henry M.
OLSEN, Sigward
 Press Brookfield Glass Co.
 1939
U 2,143,696 January 10, 1939 Apparatus for Assembling Hollow Building Blocks
Semi automatic method for assembling glass blocks		 HOLMES, Minot K.
JONES, David
 OI Owens-Illinois Glass Co.

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