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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 = '451') AND (category.subclass = '291') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '451'; Subclass is '291';

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T / S Patent Date Description Patentee Category Assigned To
 1869
U 98,270 December 28, 1869 Improvement in Machine for Grinding Glass Jars
Use of adjustable arms to grind the mouth of glass jars		 KELLY, Alexander W.
SAMUEL, John B.
 Jar  

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