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 = '422') ORDER BY assigned_to ASC, date, patent, type |
Total of 3 patents found where: Class is '425'; Subclass is '422';
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T / S | Patent | Date | Description | Patentee | Category | Assigned To |
U | 648,341 | April 24, 1900 | Die for Pottery Ware Die for pressing out door knobs |
BOCH, John W. |
Die | |
The R. Thomas & Sons Co. | ||||||
U | 899,871 | September 29, 1908 | Mantle Ring Mold A mold for making mantle rings. |
KENNEY, Benjamin D. |
Mold | The R. Thomas & Sons Co. |
Westinghouse Electric & Mfg. Co. | ||||||
U | 2,301,939 | November 17, 1942 | Production of Ceramic Bodies Press to make a very dense porcelain body. It is neither wet process nor dry process porcelain. The product was called ""Prestite"" porcelain. |
FISCHER, Eugene H. |
Press | Westinghouse Electric & Mfg. Co. |
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