|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';
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||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
|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|
|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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