|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 = '425') AND (category.subclass = '420') ORDER BY date ASC, patent, type|
Total of 7 patents found where: Class is '425'; Subclass is '420';
View a patent by clicking on the patent number. You can sort by any of the columns by clicking on the column name.
|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|U||716,343||December 16, 1902||Machine for Forming the Interiors of Plastic Materials
Press for making porcelain insulators
|LOCKE, Fred M.
|U||788,120||April 25, 1905||Press for Plastic Material
Insulator press for forming the bottom shell and threaded pinhole of multipart porcelain insulators (Thomas blue jean seam impression in bottom skirt)
|THOMAS, George W.
||Press||The R. Thomas & Sons Co.|
|U||811,602||February 6, 1906||Mold for Plastic Materials
Press mold for forming insulators
|WATTS, Arthur S.
||Press||The Locke Insulator Mfg. Co.|
|R||12,934||April 6, 1909||Die for Forming Insulators
Press die for forming insulators (reissue of patent 838,727)
|LOCKE, Fred M.
|U||1,157,612||October 19, 1915||Die for Insulators
Plunger to form suspension petticoats and threaded pinhole
|BENNETT, Cornelius Van Dyke
||Plunger||Locke Insulator Mfg. Co.|
|U||2,007,567||July 9, 1935||Apparatus for Molding Insulators
Machine for hot pressing porcelain box for street lights in one operation the interior surface with a rotating die and the exterior irregular surface with lugs with a stationary die (see 1,929,737)
|FISCHER, Eugene H.
||Manufacturing||Westinghouse Electric & Mfg. Co.|
|U||2,415,462||February 11, 1947||Ceramic Molding Press
Vacuum molding of clay articles such as insulators. This may be the patent used by Locke to make their ""vacuum dry pressing"" porcelain insulators.
|CHERRY, George L.
VEALE, Charles C.
|Press||Western Electric Co.|
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