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
CA649370A
Inventor
Maeda Katsuhiko
Onishi Akira
Ueda Kenichi
Yoshimoto Toshio
Hosono Junichi
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.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
Publication date
Application grantedgrantedCritical
Publication of CA649370ApublicationCriticalpatent/CA649370A/en