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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 = '403') AND (category.subclass = '388') ORDER BY date ASC, patent, type

Total of 3 patents found where: Class is '403'; Subclass is '388';

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T / S Patent Date Description Patentee Category Assigned To
 1867
U 61,741 February 5, 1867 Improvement in Lightning Rods
Lightning rod made from an iron rod with grooves and strips of copper slid into the grooves to make ribs
JILLSON, Clark
Lightning Rod  
 1872
U 124,264 March 5, 1872 Improvement in Lightning Rods
Lightning rod made by fastening two metal strips together by indentation, opening to form a star shape, and twising
GOODWIN, Frederick O.
Lightning Rod 1/2 to Frank Goodwin
 1916
U 1,173,418 February 29, 1916 Pole Cross-Arm
Metal pole crossarm with curved bracket that can be bolted to the pole
ETTE, Charles G.
Crossarm St. Louis Malleable Casting Co.

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