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 - Lifetime
Application number
CA 67629
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.)
AT&T Corp
Original Assignee
American Telephone and Telegraph Co Inc
Publication date
Priority to CA 67629priorityCriticalpatent/CA67629S/en
Application grantedgrantedCritical
Publication of CA67629SpublicationCriticalpatent/CA67629S/en