| SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN name ON name.patent = patent.patent AND name.type = patent.type LEFT JOIN category ON category.patent = patent.patent AND category.type = patent.type WHERE (category.class = '427') AND (category.subclass = '58') ORDER BY last_name ASC, first_name, date, patent, type |
Total of 3 patents found where: Class is '427'; Subclass is '58';
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| T / S | Patent | Date | Description | Patentee | Category | Assigned To |
| BROOKS, David | ||||||
| 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 | |
| DYKSTRA, Laurence J. MEYER, Edwin M. | ||||||
| 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. |
| HUNT, Marsden H. BARROW, George M. | ||||||
| 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. |
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