| 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 = '427') AND (category.subclass = '123') ORDER BY date ASC, patent, type |
Total of 5 patents found where: Class is '427'; Subclass is '123';
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 |
| 1934 | ||||||
| U | 1,973,076 | September 11, 1934 | Insulator RFI: coat crown with gold, platinum, bismuth & semi-conductive area |
HUNT, Marsden H. |
RFI | Westinghouse Electric & Mfg. Co. |
| 1935 | ||||||
| U | 1,987,683 | January 15, 1935 | Insulator RFI: coat crown with copper glaze to prevent AM radio interference |
HUNT, Marsden H. BARROW, George M. |
RFI | Westinghouse Electric & Mfg. Co. |
| 1941 | ||||||
| U | 2,264,152 | November 25, 1941 | Method of Forming a Metallic Surface on Ceramic Bodies RFI metallic coating that strongly adheres to the insulator |
ROWLAND, Davidge H. |
RFI | Locke Insulator Corp. |
| 1942 | ||||||
| U | 2,283,685 | May 19, 1942 | High Resistance Conducting Coating for Electric Insulators RFI coating to prevent radio interference |
MCCREERY, George L. CAMPBELL, Van E. |
RFI | The Ohio Brass Co. |
| 1959 | ||||||
| U | 2,867,551 | January 6, 1959 | Apparatus and Method for Applying Conductive Coatings to Insulators Radio treatment process for CD 239 |
KOZAK, John |
RFI | Owens-Illinois Glass Co. |
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