SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN name ON name.patent = patent.patent AND name.type = patent.type LEFT JOIN category ON category.patent = patent.patent AND category.type = patent.type WHERE (category.class = '425') AND (category.subclass = '381') ORDER BY last_name ASC, first_name, date, patent, type |
Total of 1 patents found where: Class is '425'; Subclass is '381';
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T / S | Patent | Date | Description | Patentee | Category | Assigned To |
BELLEZZA, Russell G. SKIPPER, Edward M. | ||||||
U | 2,297,646 | September 29, 1942 | Pug Mill Pug mill design to prevent stresses and strains in the clay as it is extruded |
BELLEZZA, Russell G. SKIPPER, Edward M. |
Pug Mill | Locke Insulator Corp. |
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