|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';
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||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||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
|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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