| 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 = '174') AND (category.subclass = '137A') ORDER BY date ASC, patent, type |
Total of 5 patents found where: Class is '174'; Subclass is '137A';
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| T / S | Patent | Date | Description | Patentee | Category | Assigned To |
| 1941 | ||||||
| U | 2,250,044 | July 22, 1941 | Insulator Multipart insulator with glazed sanded surfaces to improve strength of cap |
CROSKEY, Carl D. ROWLAND, Davidge H. |
Multipart | Locke Insulator Corp. |
| 1943 | ||||||
| U | 2,327,972 | August 24, 1943 | High Strength Ceramic Surface Manufacturing method of using porcelain ""sand"" with a lower coefficient of expansion than the insulator body to rough up the surface and provide a strong cement joint without reducing the effectiveness of the compression glaze (see 2,337,691) |
STETTINIUS, Kenneth E. DEWEY, Benjamin F. |
Manufacturing | Lapp Insulator Co., Inc. |
| U | 2,337,691 | December 28, 1943 | Method of Making High Strength Ceramic Surfaces Method of manufacturing insulators using porcelain ""sand"" with a lower coefficient of expansion than the insulator body to rough up the surface and provide a strong cement joint without reducing the effectiveness of the compression glaze (see 2,327,972) |
STETTINIUS, Kenneth E. DEWEY, Benjamin F. |
Manufacturing | Lapp Insulator Co., Inc. |
| 1945 | ||||||
| U | 2,389,386 | November 20, 1945 | Glazed Ceramic Compression glaze |
RUSSELL, JR., Ralston |
Glaze | Westinghouse Electric Corp. |
| 1998 | ||||||
| U | 5,796,048 | August 18, 1998 | Insulator having Conductive Surface Coating to Prevent Corona Discharge RFI coating |
SUZUKI, Yoshihiro KUTSUNA, Eiji |
RFI | NGK Insulators, Ltd. |
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