|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 = '249') AND (category.subclass = '134') ORDER BY date ASC, patent, type|
Total of 2 patents found where: Class is '249'; Subclass is '134';
View a patent by clicking on the patent number. You can sort by any of the columns by clicking on the column name.
|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|U||1,304,571||May 27, 1919||Mold for Forming Insulators or Other Porcelain Objects
Mold for bushing with undercut petticoats formed by the casting process by pouring in clay slip
|KIRK, Charles J.
|U||1,679,345||August 7, 1928||Method and Apparatus for Casting Ceramic Pieces
Manufacturing method of casting bushings with a hollow core
|AUSTIN, Arthur O.
||Manufacturing||The Ohio Brass Co.|
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