JPH0217393U - - Google Patents
Info
- Publication number
- JPH0217393U JPH0217393U JP9580888U JP9580888U JPH0217393U JP H0217393 U JPH0217393 U JP H0217393U JP 9580888 U JP9580888 U JP 9580888U JP 9580888 U JP9580888 U JP 9580888U JP H0217393 U JPH0217393 U JP H0217393U
- Authority
- JP
- Japan
- Prior art keywords
- disk
- protrusions
- large number
- regular intervals
- pointed tips
- Prior art date
- 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
Landscapes
- Drawing Aids And Blackboards (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9580888U JPH0217393U (en]) | 1988-07-20 | 1988-07-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9580888U JPH0217393U (en]) | 1988-07-20 | 1988-07-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0217393U true JPH0217393U (en]) | 1990-02-05 |
Family
ID=31320530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9580888U Pending JPH0217393U (en]) | 1988-07-20 | 1988-07-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0217393U (en]) |
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1988
- 1988-07-20 JP JP9580888U patent/JPH0217393U/ja active Pending