JPS5020521B1 - - Google Patents
Info
- Publication number
- JPS5020521B1 JPS5020521B1 JP4792969A JP4792969A JPS5020521B1 JP S5020521 B1 JPS5020521 B1 JP S5020521B1 JP 4792969 A JP4792969 A JP 4792969A JP 4792969 A JP4792969 A JP 4792969A JP S5020521 B1 JPS5020521 B1 JP S5020521B1
- 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.)
- Pending
Links
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4792969A JPS5020521B1 (en) | 1969-06-19 | 1969-06-19 | |
| FR7020604A FR2049157B1 (en) | 1969-06-04 | 1970-06-04 | |
| US00167441A US3756331A (en) | 1969-06-04 | 1971-07-29 | Earth drilling apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4792969A JPS5020521B1 (en) | 1969-06-19 | 1969-06-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5020521B1 true JPS5020521B1 (en) | 1975-07-16 |
Family
ID=12789044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4792969A Pending JPS5020521B1 (en) | 1969-06-04 | 1969-06-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5020521B1 (en) |
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1969
- 1969-06-19 JP JP4792969A patent/JPS5020521B1/ja active Pending