Legal status (The legal status 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 status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pressey Co Ltd
Original Assignee
Pressey Co Ltd
Filing date
Publication date
Priority claimed from US05/449,155external-prioritypatent/US3932709A/en
Application filed by Pressey Co LtdfiledCriticalPressey Co Ltd
Application grantedgrantedCritical
Publication of AU489147B2publicationCriticalpatent/AU489147B2/en
Publication of AU6791074ApublicationCriticalpatent/AU6791074A/en