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 = '174') AND (category.subclass = '1') ORDER BY description ASC, date, patent, type |
Total of 1 patents found where: Class is '174'; Subclass is '1';
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T / S | Patent | Date | Description | Patentee | Category | Assigned To |
1931 | ||||||
U | 1,796,427 | March 17, 1931 | Process and Apparatus for Testing Insulators Apparatus to run a high voltage test on insulators (see 1,750,699 and 1,796,427) |
AUSTIN, Arthur O. |
Manufacturing | The Ohio Brass Co. |
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