|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 = '29') AND (category.subclass = '521') ORDER BY date ASC, patent, type|
Total of 2 patents found where: Class is '29'; Subclass is '521';
View a patent by clicking on the patent number. You can sort by any of the columns by clicking on the column name.
|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|U||1,625,266||April 19, 1927||Rod Coupling
Lightning rod made solid with parallel fins and connected by coupling with matching male and female threads crimped over the ends of the rod sections
|MAST, Charles O.
||Lightning Rod Coupling||Mast Lightning Rod Co.|
|U||1,685,834||October 2, 1928||Process of Manufacturing Insulator Pins
Manufacturing method to make steel pins for wooden crossarms
|AUSTIN, Arthur O.
||Manufacturing||The Ohio Brass Co.|
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