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
CA609537A
Inventor
B. Egbert Robert
Becker Mitchell
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.)
Scientific Design Co Inc
Original Assignee
Scientific Design Co Inc
Publication date
Application grantedgrantedCritical
Publication of CA609537ApublicationCriticalpatent/CA609537A/en