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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 = '228') AND (category.subclass = '121') ORDER BY date ASC, patent, type

Total of 5 patents found where: Class is '228'; Subclass is '121';

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T / S Patent Date Description Patentee Category Assigned To
 1925
U 1,544,148 June 30, 1925 Method of Connecting Insulators
Multipart, method of cementing sections with solder		 GOUVERNEUR, Minor F. H.
 Multipart Locke Insulator Corp.
 1937
U Specimen known 2,094,287 September 28, 1937 Method of Manufacturing Multipart Glass Articles
Method to manufacture multiple glass objects (blocks, insulators, etc.)		 ZIMMERMAN, Willard P.
HOLMES, Minot K.
 Method Owens-Illinois Glass Co.
 1939
U 2,149,246 February 28, 1939 Method of Manufacturing Hollow Glass Articles
Aluminum welding of blocks		 ZIMMERMAN, Willard P.
HOLMES, Minot K.
 OI Owens-Illinois Glass Co.
U 2,164,093 June 27, 1939 Method of Joining Glass Block Sections
Automatic machine for joining glass blocks with aluminum		 SOUBIER, Leonard D.
 OI Owens-Illinois Glass Co.
 1940
U 2,198,578 April 30, 1940 Double Glazing
Double pane window glass with aluminum seal		 HAZELTON, Benjamin F.
ZIMMERMAN, Willard P.
HOLMES, Minot K.
 OI Owens-Illinois Glass Co.

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