| 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 = '501') AND (category.subclass = '127') ORDER BY date ASC, patent, type |
Total of 2 patents found where: Class is '501'; Subclass is '127';
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 |
| 1941 | ||||||
| U | 2,250,044 | July 22, 1941 | Insulator Multipart insulator with glazed sanded surfaces to improve strength of cap |
CROSKEY, Carl D. ROWLAND, Davidge H. |
Multipart | Locke Insulator Corp. |
| 1982 | ||||||
| U | 4,332,913 | June 1, 1982 | Flux Combination of Barium Oxide and Potassium Feldspar for High Strength Alumina Porcelain Electric Insulators Porcelain composition with low shrinkage during firing |
BOCK, Peter |
Porcelain | Rosenthal Technik AG |
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