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
CA599479A
Inventor
Edward G. Carlson, Jr.
Richard Keller John
M. Olson Archie
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.)
MARSHALL-WELLS Co
Original Assignee
MARSHALL-WELLS Co
Publication date
Application grantedgrantedCritical
Publication of CA599479ApublicationCriticalpatent/CA599479A/en