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
Priority claimed from US07/162,163external-prioritypatent/US4836243A/en
Application filed by Otis Eng CofiledCriticalOtis Eng Co
Publication of SG28193GpublicationCriticalpatent/SG28193G/en