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
CA616988A
Inventor
D. Berkowitz Edwin
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.)
GATES AND SONS
Original Assignee
GATES AND SONS
Publication date
Application grantedgrantedCritical
Publication of CA616988ApublicationCriticalpatent/CA616988A/en