|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 = '457') ORDER BY category ASC, date, patent, type|
Total of 7 patents found where: Class is '425'; Subclass is '457';
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||774,765||November 15, 1904||Art and Method of Manufacturing Earthenware Insulators
Earthenware, manufacture of
|LOCKE, Fred M.
|U||790,214||May 16, 1905||Method of Manufacturing High Potential Earthenware Insulators
Earthenware, manufacture of hi-potential insulators
|LOCKE, Fred M.
|U||1,719,989||July 9, 1929||Method of and Apparatus for Assembling Insulators
Method of assembling the shells, holding downward pressure, and vibrating to settle cement around the shells to eliminate air
|MOORE, JR., Stewart L.
||Manufacturing||Locke Insulator Corp.|
|U||1,929,737||October 10, 1933||Apparatus for Molding Insulators
Die to hot press to form an insulator for street lights with one part of the mold rotating and a stationary part to form petticoats with integral lugs (see 2,007,567)
|FISCHER, Eugene H.
||Manufacturing||The Harford Faience Co.|
|U||1,204,745||November 14, 1916||Pressure Die for Insulator Pressing Molds
Insulator threading press
|DAHL-JENSEN, Jens Peter
|U||2,068,941||January 26, 1937||Process and Apparatus for Manufacturing Insulators
Plunger to first form the pinhole in a porcelain insulator by first plunging a pinhole without threads then form the threads
|BOVARD, Floyd G.
||Press||The Ohio Brass Co.|
|U||1,407,550||February 21, 1922||Method and Machine for Forming Impressions in Plastic Articles
Threading porcelain by gyrating the thread mandrel (""wobbler"" method)
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