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
CA786393A
Inventor
W. Parrish Roger
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.)
JF Pritchard and Co
Original Assignee
Roger W Parrish
JF Pritchard and Co
Publication date
Application grantedgrantedCritical
Publication of CA786393ApublicationCriticalpatent/CA786393A/en