| 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 = '58') ORDER BY date ASC, patent, type |
Total of 3 patents found where: Class is '427'; Subclass is '58';
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 |
| 1871 | ||||||
| U | 114,911 | May 16, 1871 | Improvement in Galvanic Batteries Use of paraffin or paraffinic oil to coat surface of battery acid to prevent evaporation |
BROOKS, David |
Battery | |
| 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. |
| 1942 | ||||||
| U | 2,274,955 | March 3, 1942 | High Tension Electric Insulator and Method of Coating Same RFI: antimony coated top |
DYKSTRA, Laurence J. MEYER, Edwin M. |
RFI | Victor Insulators, Inc. |
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