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
CA821339A
Inventor
P. Haen Eugene
W. Smith Robert
B. Skromme Robert
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.)
Badger Northland Inc
Original Assignee
Eugene P Haen
Badger Northland Inc
Publication date
Application grantedgrantedCritical
Publication of CA821339ApublicationCriticalpatent/CA821339A/en