| 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 = '403') AND (category.subclass = '388') ORDER BY date ASC, patent, type |
Total of 3 patents found where: Class is '403'; Subclass is '388';
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 |
| 1867 | ||||||
| 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 |
JILLSON, Clark |
Lightning Rod | |
| 1872 | ||||||
| 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 |
| 1916 | ||||||
| U | 1,173,418 | February 29, 1916 | Pole Cross-Arm Metal pole crossarm with curved bracket that can be bolted to the pole |
ETTE, Charles G. |
Crossarm | St. Louis Malleable Casting Co. |
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