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
CA633382A
Inventor
E. Edminster Robert
L. Fritz Elliot
M. Valehrach Emil
A. Weidenhammer James
J. Furr Robert
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Publication date
Application grantedgrantedCritical
Publication of CA633382ApublicationCriticalpatent/CA633382A/en