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
Application number
JP4792969A
Other languages
Japanese (ja)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP4792969A priority Critical patent/JPS5020521B1/ja
Priority to FR7020604A priority patent/FR2049157B1/fr
Priority to US00167441A priority patent/US3756331A/en
Publication of JPS5020521B1 publication Critical patent/JPS5020521B1/ja
Pending legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP4792969A 1969-06-04 1969-06-19 Pending JPS5020521B1 (enrdf_load_stackoverflow)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP4792969A JPS5020521B1 (enrdf_load_stackoverflow) 1969-06-19 1969-06-19
FR7020604A FR2049157B1 (enrdf_load_stackoverflow) 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 (enrdf_load_stackoverflow) 1969-06-19 1969-06-19

Publications (1)

Publication Number Publication Date
JPS5020521B1 true JPS5020521B1 (enrdf_load_stackoverflow) 1975-07-16

Family

ID=12789044

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4792969A Pending JPS5020521B1 (enrdf_load_stackoverflow) 1969-06-04 1969-06-19

Country Status (1)

Country Link
JP (1) JPS5020521B1 (enrdf_load_stackoverflow)

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