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
CA666616A
Inventor
R. Crawford James
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.)
Crawford and Russell Inc
Original Assignee
James R Crawford
Crawford and Russell Inc
Publication date
Application grantedgrantedCritical
Publication of CA666616ApublicationCriticalpatent/CA666616A/en