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

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

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T / S Patent Date Description Patentee Category Assigned To
U 897,636 September 1, 1908 Process for Making Feldspar Flux
Feldspar flux, method of preparing
LOCKE, Fred M.
U 907,155 December 22, 1908 Manufacture of Spar Insulators
Feldspar insulator material (see reissue 12,992 on 7-13-1909)
LOCKE, Fred M.
R 12,992 July 13, 1909 Manufacture of Spar Insulators
Feldspar insulator material (reissue of 907,155)
LOCKE, Fred M.

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