| 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 = '174') AND (category.subclass = '14R') ORDER BY date ASC, patent, type |
Total of 2 patents found where: Class is '174'; Subclass is '14R';
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 |
| 1878 | ||||||
| U | 199,506 | January 22, 1878 | Improvement in Insulating Underground Telegraph Wires Underground cable insulated by wrapping with cotton, hemp, or jute and saturating it with paraffin and inserting the wires in heated metal pipes flushed with air to remove moisture. |
BROOKS, David |
Cable | |
| 1891 | ||||||
| U | 455,107 | June 30, 1891 | Insulator Third rail insulator with cup to hold hygroscopic chemical and means to heat insulator to drive off moisture |
MUNSIE, James F. |
Third Rail | |
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