Document Type and Number:
Japanese Patent JPS5416201
Kind Code:
U
Application Number:
JP8758077U
Publication Date:
February 02, 1979
Filing Date:
July 04, 1977
Export Citation:
International Classes:
E21B10/32; (IPC1-7): E02D17/148; E21B9/26
Previous Patent: 半導体装置
Next Patent: MASTER CARD FOR GELATIN PLATE PRINTING AND METHOD OF MAKING MASTER CARD
Next Patent: MASTER CARD FOR GELATIN PLATE PRINTING AND METHOD OF MAKING MASTER CARD