| 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 = '338') ORDER BY date ASC, patent, type |
Total of 2 patents found where: Class is '403'; Subclass is '338';
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 |
| 1868 | ||||||
| U | 74,406 | February 11, 1868 | Improvement in Lightning Rods Lightning rod made with twists and folds |
MUNSON, David |
Lightning Rod | |
| 1921 | ||||||
| U | 1,393,330 | October 11, 1921 | Electrical Insulator Links for Hewlett suspension disks (see 1,110,934) |
WELCH, Walter J. TRACY, Atlee H. |
Suspension | H. M. Byllesby & Co. |
Total of 0.00 seconds