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 = '285') AND (category.subclass = '417') ORDER BY date ASC, patent, type |
Total of 2 patents found where: Class is '285'; Subclass is '417';
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 |
1873 | ||||||
U | 139,841 | June 10, 1873 | Improvement in Coupling Tubular Lightning Rods Means of coupling tubular lightning rods |
WESTON, James H. |
Lightning Rod | |
1892 | ||||||
U | 470,514 | March 8, 1892 | Lightning Conductor Hollow conductor rod with slip fittings |
SIMPSON, Harvey |
Lightning Rod |
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