| 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 |
| 1870 | ||||||
| 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. |
Lightning Rod | |
| 1871 | ||||||
| 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 | |
| 1876 | ||||||
| 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 |
JOHNSON, Isaac |
Lightning Rod Coupling | Reyburn, Hunter & Co. |
| 1892 | ||||||
| U | 470,514 | March 8, 1892 | Lightning Conductor Hollow conductor rod with slip fittings |
SIMPSON, Harvey |
Lightning Rod | |
| 1925 | ||||||
| U | 1,542,588 | June 16, 1925 | Method of Making Suspension Insulators of Glass Suspension glass insulator with glass pressed around mounting pin |
SCHOTT, Erich |
Suspension | Jenaer Glaswerk Schott & Gen. |
| 1927 | ||||||
| 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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