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SELECT DISTINCT patent.*, YEAR(date) as year FROM patent WHERE (assigned_to = 'Frank H. Riddle') ORDER BY date ASC, patent, type

Total of 1 patents found where: Assigned To is 'Frank H. Riddle';

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T / S Patent Date Description Patentee Category Assigned To
 1925
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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