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
CA746246A
Inventor
Julius E. Underwood, Jr.
A. Stiles Gene
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.)
Pratt Read and Co
Original Assignee
Pratt Read and Co
Publication date
Application grantedgrantedCritical
Publication of CA746246ApublicationCriticalpatent/CA746246A/en