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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 = '29') AND (category.subclass = '517') ORDER BY date ASC, patent, type

Total of 6 patents found where: Class is '29'; Subclass is '517';

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T / S Patent Date Description Patentee Category Assigned To
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
Lightning Rod  
U 119,987 October 17, 1871 Improvement in Machines for Making Lightning Rods
Machine for making lightning rods (see 113,154) by wrapping wires around a central core, covering with a sheath of sheet copper, and coiling up the rod as it is produced
KNAPP, George S.
Lightning Rod Machine  
U 173,962 February 22, 1876 Improvement in Couplings for Tubing and Lightning Rods
Coupling made of a short hollow piece placed inside both ends of the rod and crimped down through the rod ends to secure the sections
Lightning Rod Coupling Reyburn, Hunter & Co.
U 470,514 March 8, 1892 Lightning Conductor
Hollow conductor rod with slip fittings
Lightning Rod  
U 1,542,588 June 16, 1925 Method of Making Suspension Insulators of Glass
Suspension glass insulator with glass pressed around mounting pin
Suspension Jenaer Glaswerk Schott & Gen.
U 1,625,266 April 19, 1927 Rod Coupling
Lightning rod made solid with parallel fins and connected by coupling with matching male and female threads crimped over the ends of the rod sections
MAST, Charles O.
Lightning Rod Coupling Mast Lightning Rod Co.

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