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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 = '425') AND (category.subclass = '307') ORDER BY date ASC, patent, type

Total of 2 patents found where: Class is '425'; Subclass is '307';

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T / S Patent Date Description Patentee Category Assigned To
 1929
U 1,697,422 January 1, 1929 Device for Cutting Holes in Insulators
Device for cutting holes in Hewlett type suspension disks for links		 GOUVERNEUR, Minor F. H.
 Manufacturing Locke Insulator Corp.
 1958
U 2,830,648 April 15, 1958 Process and Apparatus for Producing a Glass Fiber Mat
Glass marbles are used to feed the machine to produce a glass fiber mat.		 HADDOCX, Edward J.
 Glass Marble L. O. F. Glass Fibers Co.

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