| 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 = '340') AND (category.subclass = '297') ORDER BY date ASC, patent, type |
Total of 2 patents found where: Class is '340'; Subclass is '297';
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 |
| 1872 | ||||||
| U | 127,041 | May 21, 1872 | Improvement in Fire Alarm Signal Boxes Design for a fire alarm signal box |
FLOYD, George |
Fire Alarm | |
| 1887 | ||||||
| U | 362,477 | May 3, 1887 | Electric Police Call Alarm Box Police call alarm box with a key |
COUGHLIN, John J. |
Alarm Box | 3/4 to Hern, Prendergast, Oakman |
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