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
CA839417A
Inventor
P. Chapman William
C. Donovan John
C. Smith Carleton
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.)
Johnson Service Co
Original Assignee
Johnson Service Co
Publication date
Application grantedgrantedCritical
Publication of CA839417ApublicationCriticalpatent/CA839417A/en