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.)
BOARD OF CONTROL OF MICHIGAN COLLEGE OF MINING AND TECHNOLOGY
Original Assignee
BOARD OF CONTROL OF MICHIGAN COLLEGE OF MINING AND TECHNOLOGY
Donald J Yeadon
Publication date
Application grantedgrantedCritical
Publication of CA571573ApublicationCriticalpatent/CA571573A/en