SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN name ON name.patent = patent.patent AND name.type = patent.type WHERE (category = 'Telephone') ORDER BY last_name DESC, first_name, date, patent, type |
Total of 1 patents found where: Category is 'Telephone';
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T / S | Patent | Date | Description | Patentee | Category | Assigned To |
BARRATT, John A. | ||||||
U | 392,775 | November 13, 1888 | Electric Circuit Criss-crossing of overhead telephone wire to prevent crosstalk between parallel lines |
BARRATT, John A. |
Telephone | The American Telephone & Telegraph Co. |
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