|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 date ASC, 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|
|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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