|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 = '209') ORDER BY date ASC, patent, type|
Total of 2 patents found where: Class is '209';
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||771,557||October 4, 1904||Apparatus for Screening Liquid Clay
miscellaneous apparatus for screening liquid clay
|LOCKE, Fred M.
|U||1,528,908||March 10, 1925||Process of Forming Ceramic Products
Process of adding reagents to accelerate hardening of the clay to reduce the time body is in mold
|BLEININGER, Albert V.
||Manufacturing||1/2 to Frank H. Riddle|
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