Core extraction device - Christensen Maikai Co., Ltd.

Title:

Core extraction device

Document Type and Number:

Japanese Patent JP6016419

Kind Code:

B2

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Inventors:

Hiroyuki Ando
Tetsuomi Miyamoto

Application Number:

JP2012088116A

Publication Date:

October 26, 2016

Filing Date:

April 09, 2012

Export Citation:

Assignee:

Christensen Maikai Co., Ltd.

International Classes:

E21B25/00; E02D1/04

Domestic Patent References:

JP2007231630A
JP50010521B1

Foreign References:

US2621897

Attorney, Agent or Firm:

Fumio Takino
Hideo Takino
Takao Kawasaki
Toshiaki Tsuda
Masashi Torino
Park Ji-un

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