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
CA875749A
Inventor
J. Veater Donald
B. Hill Sumner
J. Ruffner Lawrence
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.)
Erie Technological Products Inc
Original Assignee
Erie Technological Products Inc
Publication date
Application grantedgrantedCritical
Publication of CA875749ApublicationCriticalpatent/CA875749A/en