|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 = '174') AND (category.subclass = '94R') ORDER BY date ASC, patent, type|
Total of 7 patents found where: Class is '174'; Subclass is '94R';
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||74,406||February 11, 1868||Improvement in Lightning Rods
Lightning rod made with twists and folds
|U||99,381||February 1, 1870||Improvement in Lightning Rods
Square hollow lightning rod connected with square plug that fits inside the ends and secured by crimping with a punch
|WEST, J. D.
|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
|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||152,153||June 16, 1874||Improvement in Lightning Rods
Lightning rod made of sheet metal rolled to form four tubular sections with two of the tubes fitted with dowell pins to connect the rod sections
|MOTT, John M.
|U||375,756||January 3, 1888||Lightning Rod
Coupling for lightning rods that allows each section to be screwed together
|LAWSHE, Spencer R.
||Lightning Rod Coupling|
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