JPS63153370U - - Google Patents

Info

Publication number

JPS63153370U

JPS63153370U JP4596287U JP4596287U JPS63153370U JP S63153370 U JPS63153370 U JP S63153370U JP 4596287 U JP4596287 U JP 4596287U JP 4596287 U JP4596287 U JP 4596287U JP S63153370 U JPS63153370 U JP S63153370U

Authority

JP

Japan

Prior art keywords

disc

recording medium

shaped recording

center core

clock member

Prior art date

1987-03-28

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.)

Pending

Links

• Espacenet
• Global Dossier
• Discuss

• 238000003780 insertion Methods 0.000 claims description 2
• 230000037431 insertion Effects 0.000 claims description 2
• 238000012986 modification Methods 0.000 description 1
• 230000004048 modification Effects 0.000 description 1