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
CA666858A
Inventor
J. Kaehni Frank
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.)
ECONOMY ENGINE Co
Original Assignee
ECONOMY ENGINE Co
Publication date
Application grantedgrantedCritical
Publication of CA666858ApublicationCriticalpatent/CA666858A/en