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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 = '307') AND (category.subclass = '109') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '307'; Subclass is '109';

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T / S Patent Date Description Patentee Category Assigned To
 1940
U Specimen known 2,195,986 April 2, 1940 Transmission Line Transposition
Transposition block (flat) for short wave radio antenna made of Faradite		 GODDARD, DeWitt Rugg
 Transposition Radio Corporation of America

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