| 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 = '123') AND (category.subclass = '169P') ORDER BY date ASC, patent, type |
Total of 3 patents found where: Class is '123'; Subclass is '169P';
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 | 1,128,747 | February 16, 1915 | Method of Manufacturing Porcelain Insulators Manufacturing process for porcelain insulator firing unglazed, then filling porous porcelain with oxidizable oil and rendering the oil stable with ozone to form a coating to replace expense of firing on a glaze |
BOEHM, Wilhelm |
Manufacturing | |
| 1929 | ||||||
U  |
1,700,066 | January 22, 1929 | Insulator for Radio Frequency Currents Radio strain insulator made from Pyrex glass for antennas |
MARSHALL, Albert E. |
Radio | Corning Glass Works |
| 1944 | ||||||
| U | 2,357,550 | September 5, 1944 | Insulator RFI coating applied before firing the insulator |
ROWLAND, Davidge H. |
RFI | Locke Insulator Corp. |
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