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
CA728374A
Inventor
F. Ball Arthur
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.)
ESSEX PRODUCTS
Original Assignee
ESSEX PRODUCTS
Publication date
Application grantedgrantedCritical
Publication of CA728374ApublicationCriticalpatent/CA728374A/en