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
CA622147A
Inventor
D. Coxe Charles
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.)
Handy and Harman
Original Assignee
Handy and Harman
Publication date
Application grantedgrantedCritical
Publication of CA622147ApublicationCriticalpatent/CA622147A/en