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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 = '340') ORDER BY assigned_to ASC, date, patent, type

Total of 3 patents found where: Class is '340';

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T / S Patent Date Description Patentee Category Assigned To
U 127,041 May 21, 1872 Improvement in Fire Alarm Signal Boxes
Design for a fire alarm signal box
FLOYD, George
Fire Alarm  
 Hern, Prendergast, Oakman
U 362,477 May 3, 1887 Electric Police Call Alarm Box
Police call alarm box with a key
COUGHLIN, John J.
Alarm Box 3/4 to Hern, Prendergast, Oakman
 Locke Insulator Corp.
U 1,976,378 October 9, 1934 Aviation Marker
Aviation warning light attached to a suspension insulator
VROOMAN, Edward C.
Misc Locke Insulator Corp.

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