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
CA690754A
Inventor
John P. Rex, Jr.
B. Arrington Thomas
J. Pellegrino Donald
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.)
Rex Roto Corp
Original Assignee
Rex Roto Corp
Publication date
Application grantedgrantedCritical
Publication of CA690754ApublicationCriticalpatent/CA690754A/en