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
CA872535A
Inventor
W. Keeling Kenneth
F. Wentworth Amaziah
Walter H. Berg, Jr.
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.)
A F WENTWORTH AND ASSOCIATES
Original Assignee
A F WENTWORTH AND ASSOCIATES
Publication date
Application grantedgrantedCritical
Publication of CA872535ApublicationCriticalpatent/CA872535A/en