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
CA763564A
Inventor
John L. Poesl
Original Assignee
UNELCO LIMITED-UNELCO Ltee
Publication date
Application grantedgrantedCritical
Publication of CA763564ApublicationCriticalpatent/CA763564A/en