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 = '470') AND (category.subclass = '181') ORDER BY last_name DESC, first_name, date, patent, type |
Total of 2 patents found where: Class is '470'; Subclass is '181';
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T / S | Patent | Date | Description | Patentee | Category | Assigned To |
YOUNG, George F. | ||||||
U | 954,490 | April 12, 1910 | Machine for Threading Porcelain Insulators Machine to form threads in wet process porcelain |
YOUNG, George F. |
Thread | Pittsburg High Voltage Insulator Co. |
BENNETT, Cornelius Van Dyke | ||||||
U | 1,567,027 | December 29, 1925 | Insulator Threading Machine Machine to form threads in plastic clay |
BENNETT, Cornelius Van Dyke |
Press | The Porcelain Insulator Corp. |
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