PATLY.AIApplication
11575430 · CHANGE-OVER APPARATUS FOR COOLING GAS PASSAGES IN VACUUM HEAT TREATING FURNACE
Filed 2007-03-16 · Granted · Patent 7377774 (2008-05-27) The official file ↗The patent and its PDF ↗ · Art unit 4124 · Examiner Andrew Mark Juettner · CPC F27D 9/00 · ISHIKAWAJIMA-HARIMA HEAVY INDUSTRIES CO., LTD. · GRIFFIN BUTLER WHISENHUNT & SZIPL LLP
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to disposition 14.4 mo
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