Title:
【考案の名称】油圧ドリフターの打撃補助装置
Document Type and Number:
Japanese Patent JPH0716797
Kind Code:
Y2
Inventors:
Fujikawa Kozo
Application Number:
JP11387789U
Publication Date:
April 19, 1995
Filing Date:
September 28, 1989
Export Citation:
Assignee:
Mazda Astec Co., Ltd.
International Classes:
E21B1/26; B25D17/08; E21B1/00; (IPC1-7): E21C3/20; B25D17/08
Domestic Patent References:
| JP61204496A | ||||
| JP211890U |
Attorney, Agent or Firm:
Aoyama Ryo (2 outside people)
Next Patent: DEVICE FOR HANDLING REMAINING MATERIAL IN COIL LINE