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
CA647548A
Inventor
J. Kasper Elmer
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.)
Royal Appliance Manufacturing Co
Original Assignee
Royal Appliance Manufacturing Co
Publication date
Application grantedgrantedCritical
Publication of CA647548ApublicationCriticalpatent/CA647548A/en