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.)
Expired
Application number
CA815300A
Inventor
J. Olander Roland
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.)
W H MINER Inc
Original Assignee
W H MINER Inc
Publication date
Application grantedgrantedCritical
Publication of CA815300ApublicationCriticalpatent/CA815300A/en