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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 = '137B') ORDER BY date ASC, patent, type

Total of 10 patents found where: Class is '174'; Subclass is '137B';

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T / S Patent Date Description Patentee Category Assigned To
 1876
U 176,067 April 11, 1876 Improvement in Processes for Toughening Glass
Method of annealing glass		 ROGERS, George E.
 Glass  
 1884
U 297,683 April 29, 1884 Telephone Line
Insulator and pin coated with waterproof compound		 DOOLITTLE, Thomas B.
 Miscellaneous  
 1911
U 1,006,040 October 17, 1911 Insulator
Suspension using multiple parts connected with a cable		 ALSBERG, Julius
 Suspension  
 1929
U Specimen known 1,700,066 January 22, 1929 Insulator for Radio Frequency Currents
Radio strain insulator made from Pyrex glass for antennas		 MARSHALL, Albert E.
 Radio Corning Glass Works
 1933
U 1,931,626 October 24, 1933 Insulator
Threads molded from cement in finished insulator		 STEVENS, Frank J.
 Thread Locke Insulator Corp.
 1940
U 2,198,734 April 30, 1940 Insulator
Suspension disk with crown more tempered than skirt for strength		 LITTLETON, Jesse T.
 Suspension Corning Glass Works
 1942
U Specimen known 2,304,483 December 8, 1942 Electrical Insulator
Rubber pin type insulator		 SMITH, Donald H.
WHEELER, Herbert H.
 Rubber Western Union Telegraph Co.
 1948
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.
 1963
U Specimen known 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.
 1988
U 4,757,162 July 12, 1988 Rigid Electrical Insulator Including a Lightly Tempered Soda-Lime Glass Dielectric
Glass insulator with controlled stress and compression		 DUMORA, Denis
PARANT, Jean-Paul
PARGAMIN, Laurent
 Glass Ceraver

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