JPS5422723Y2 - - Google Patents
Info
- Publication number
- JPS5422723Y2 JPS5422723Y2 JP1974100566U JP10056674U JPS5422723Y2 JP S5422723 Y2 JPS5422723 Y2 JP S5422723Y2 JP 1974100566 U JP1974100566 U JP 1974100566U JP 10056674 U JP10056674 U JP 10056674U JP S5422723 Y2 JPS5422723 Y2 JP S5422723Y2
- Authority
- JP
- Japan
- 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
Links
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1974100566U JPS5422723Y2 (https=) | 1974-08-22 | 1974-08-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1974100566U JPS5422723Y2 (https=) | 1974-08-22 | 1974-08-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5128301U JPS5128301U (https=) | 1976-03-01 |
| JPS5422723Y2 true JPS5422723Y2 (https=) | 1979-08-07 |
Family
ID=28305927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1974100566U Expired JPS5422723Y2 (https=) | 1974-08-22 | 1974-08-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5422723Y2 (https=) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3473617A (en) * | 1968-03-20 | 1969-10-21 | Wayland D Elenburg | Method and apparatus for drilling and coring |
| CA926377A (en) * | 1970-08-25 | 1973-05-15 | Harold S. Chapman | Dual concentric drillpipe |
-
1974
- 1974-08-22 JP JP1974100566U patent/JPS5422723Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5128301U (https=) | 1976-03-01 |