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
CA629835A
Inventor
E. Frank Wallace
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.)
Franklin Institute
Original Assignee
Wallace E Frank
Franklin Institute
Publication date
Application grantedgrantedCritical
Publication of CA629835ApublicationCriticalpatent/CA629835A/en