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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 = '427') AND (category.subclass = '255.21') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '427'; Subclass is '255.21';

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T / S Patent Date Description Patentee Category Assigned To
 1960
U 2,953,483 September 20, 1960 Method and Apparatus for Applying Coatings to Selected Areas of Articles
Radio treatment process for CD 239		 TOROK, Julius J.
 RFI Owens-Illinois Glass Co.

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