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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 category ASC, date, 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
 Glass
U 176,067 April 11, 1876 Improvement in Processes for Toughening Glass
Method of annealing glass
ROGERS, George E.
Glass  
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
 Manufacturing
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.
 Miscellaneous
U 297,683 April 29, 1884 Telephone Line
Insulator and pin coated with waterproof compound
DOOLITTLE, Thomas B.
Miscellaneous  
 Porcelain
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.
 Radio
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
 Rubber
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.
 Suspension
U 1,006,040 October 17, 1911 Insulator
Suspension using multiple parts connected with a cable
ALSBERG, Julius
Suspension  
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
 Thread
U 1,931,626 October 24, 1933 Insulator
Threads molded from cement in finished insulator
STEVENS, Frank J.
Thread Locke Insulator Corp.

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