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
CA845612A
Inventor
D. Brew Richard
J. Duggan John
F. Andersen Ingar
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.)
Richard D Brew and Co Inc
Original Assignee
Ingar F Andersen
John J Duggan
Richard D Brew and Co Inc
Publication date
Application grantedgrantedCritical
Publication of CA845612ApublicationCriticalpatent/CA845612A/en