Title:
IMPACT DRILLING APPARATUS
Document Type and Number:
Japanese Patent JPS60112987
Kind Code:
A
Inventors:
GUSUTAFU SHIYATSUTSUMAIRU
KONRAATO SHIEEN
KONRAATO SHIEEN
Application Number:
JP23049584A
Publication Date:
June 19, 1985
Filing Date:
November 02, 1984
Export Citation:
Assignee:
VER EDELSTAHLWERKE AG (AT)
International Classes:
B25D9/16; E21B1/00; E21B1/26; E21B44/06; F15B11/17; (IPC1-7): B25D9/16; E21C3/20
Attorney, Agent or Firm:
Osamu Nakahira
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