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SELECT DISTINCT patent.*, YEAR(date) as year FROM patent WHERE (category = 'Vacuum') ORDER BY date ASC, patent, type

Total of 3 patents found where: Category is 'Vacuum';

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T / S Patent Date Description Patentee Category Assigned To
 1922
U Specimen known 1,424,924 August 8, 1922 Method of Producing Clay Bodies
Vacuum process for removing air from the clay. Patent was owned by Lapp Insulator Co.		 LAPP, Grover W.
 Vacuum  
 1925
U 1,561,002 November 10, 1925 Method of Producing Clay Bodies and Apparatus Used
Vacuum process for removing air from the clay		 LAPP, Grover W.
 Vacuum Lapp Insulator Co., Inc.
 1926
U 1,589,617 June 22, 1926 Process for Preparing Material for Ceramic Articles
Vacuum pugging after mixing dry ingredients with exact percent water needed		 AUSTIN, Arthur O.
 Vacuum The Ohio Brass Co.

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