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

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

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T / S Patent Date Description Patentee Category Assigned To
 Vacuum
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  
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.
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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