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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 = '516') ORDER BY date ASC, patent, type

Total of 2 patents found where: Class is '516';

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T / S Patent Date Description Patentee Category Assigned To
 1933
U 1,925,058 August 29, 1933 Process for Forming Plastic Clay Masses
Wet process clay reflocculation method to eliminate pugging process		 ROWLAND, Davidge H.
WETZEL, Kurt
 Wet Process Locke Insulator Corp.
 1939
U 2,155,835 April 25, 1939 Ceramic Insulating Material
Improved ceramic composition using titanium oxide that will fire at typical kiln temperatures		 MCCREERY, George L.
CAMPBELL, Van E.
HIGGINS, Ray
 Ceramic Composition The Ohio Brass Co.

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