| 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 = '70') ORDER BY specimen ASC, date, patent, type |
Total of 4 patents found where: Class is '501'; Subclass is '70';
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 |
| 1915 | ||||||
| U | 1,143,885 | June 22, 1915 | Process for Making a Compound of Glass Glass made from cullet with large amount of lime added for toughness |
BROOKFIELD, Henry M. |
Glass | |
| 1932 | ||||||
| U | 1,886,280 | November 1, 1932 | Ultra Violet Ray Transmitting Glass and to a Batch and Method for Making the Same Boro-silicate glass, method to make glass to transmit UV light |
LOCKE, Fred M. LOCKE, Fred J. |
Boron | Corning Glass Works |
| 1988 | ||||||
| U | 4,782,199 | November 1, 1988 | Insulators Having Improved Steep Wave Front Characteristics Suspension, head treated with special glaze to strengthen cap/cement |
SEIKE, Shoji TOTOKI, Takao MIMA, Toshiyuki |
Suspension | NGK Insulators, Ltd. |
| 1939 | ||||||
U  |
2,157,100 | May 9, 1939 | Glazed Ceramic Insulator and the Like Glaze - compression glaze |
ROWLAND, Davidge H. |
Glaze | Locke Insulator Corp. |
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