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
CA890285A
Inventor
Rynning Roald
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.)
Butterworth System Inc
Original Assignee
Roald Rynning
Butterworth System Inc
Publication date
Application grantedgrantedCritical
Publication of CA890285ApublicationCriticalpatent/CA890285A/en