|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 = '156') AND (category.subclass = '89.12') ORDER BY date ASC, patent, type|
Total of 3 patents found where: Class is '156'; Subclass is '89.12';
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||1,164,739||December 21, 1915||Method of Making Insulating Devices
Manufacturing technique to make long bushings with petticoats by stacking them on a fired core and fusing the petticoats to the core
|MERSHON, Ralph D.
|U||1,431,137||October 3, 1922||Joint for Articles of Ceramic and Similar Materials and Method of Producing Same
Multipart joined by sand, glaze-welding and/or differential shrinkage
|AUSTIN, Arthur O.
||Multipart||The Ohio Brass Co.|
|U||2,234,391||March 11, 1941||Method of Manufacturing Electric Insulators
Method of making station post insulators with metal caps
|TAYLOR, John J.
||Insulator||The Ohio Brass Co.|
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