Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Allegheny Ludlum CorpfiledCriticalAllegheny Ludlum Corp
Priority to IN542DE1989priorityCriticalpatent/IN175207B/en
Publication of IN175207BpublicationCriticalpatent/IN175207B/en