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 = '501') AND (category.subclass = '144') ORDER BY assigned_to ASC, date, patent, type |
Total of 6 patents found where: Class is '501'; Subclass is '144';
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T / S | Patent | Date | Description | Patentee | Category | Assigned To |
General Electric Co. | ||||||
U | 3,097,101 | July 9, 1963 | Ceramic Product and Method of Making the Same Increases the mechanical and electrical strength of porcelain insulators by controlling the grain size of the flint used in the porcelain body and the glaze. |
LESTER, Ronald H. |
Porcelain | General Electric Co. |
Jeffery-Dewitt Co. | ||||||
U | 1,409,953 | March 21, 1922 | Ceramic Insulating Material Porcelain composition using Sillimanite for high electrical and mechanical strength and low coefficient of expansion, which is particularly suitable for spark plugs |
JEFFERY, Joseph A. |
Porcelain | Jeffery-Dewitt Co. |
Locke Insulator Corp. | ||||||
U | 2,157,100 | May 9, 1939 | Glazed Ceramic Insulator and the Like Glaze - compression glaze |
ROWLAND, Davidge H. |
Glaze | Locke Insulator Corp. |
Rosenthal Technik AG | ||||||
U | 4,332,913 | June 1, 1982 | Flux Combination of Barium Oxide and Potassium Feldspar for High Strength Alumina Porcelain Electric Insulators Porcelain composition with low shrinkage during firing |
BOCK, Peter |
Porcelain | Rosenthal Technik AG |
Star Porcelain Co. | ||||||
U | 1,633,462 | June 21, 1927 | Ceramic Insulating Material Clay mixture to produce a black porcelain body. |
SORTWELL, Harold H. |
Porcelain | Star Porcelain Co. |
The Porcelain Insulator Corp. | ||||||
U | 2,437,559 | March 9, 1948 | Insulator and Method of Manufacturing Same Addition of powdered aluminum to improve quality of porcelain |
ROWLAND, Davidge H. |
Manufacturing | The Porcelain Insulator Corp. |
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