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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 = '285') AND (category.subclass = '399') ORDER BY date ASC, patent, type

Total of 4 patents found where: Class is '285'; Subclass is '399';

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T / S Patent Date Description Patentee Category Assigned To
U 100,549 March 8, 1870 Improvement in Lightning Rods
Lightning rod made of two sheets of metal forming double tubing with flanges and twisted
Lightning Rod  
U 118,166 August 15, 1871 Improvement in Lightning Rods
Coupling for tubular or solid lightning rods that is screwed together and made solid by a ferrule secured with a pin
SUTLIFF, Oliver L.
Lightning Rod Coupling  
U 145,641 December 16, 1873 Improvement in Couplings for Tubular Lightning Rods
Means of coupling tubular lightning rods
FRITSCH, Joseph W.
Lightning Rod  
U 214,545 April 22, 1879 Improvement in Lightning Rod Couplings
Lightning rod coupling with one tapered end to fit snugly in the other end (see reissue 9,145)
BACON, Elmore C.
Lightning Rod Coupling  

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