| 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 |
| 1919 | ||||||
| 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. BRAIN, GEORGE |
Mold | |
| 1928 | ||||||
| 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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