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
CA817185A
Inventor
L. Bevard Roger
W. Johnson Harry
W. Erickson Don
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.)
LAKE SHORE
Original Assignee
LAKE SHORE
Publication date
Application grantedgrantedCritical
Publication of CA817185ApublicationCriticalpatent/CA817185A/en