YASUO HAYAKAWA

Follow

Person

TSUKUBA-SHI, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Narrow gap welding method and welding apparatus
- Patent number 6,534,746
- Issue date Mar 18, 2003
- Hetachi Construction Machinery Co., Ltd.
- Toru Takatani
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Rotary type construction machine and cab, equipment housing cover a...
- Patent number 6,394,212
- Issue date May 28, 2002
- Hitachi Construction Machinery Co., Ltd.
- Yutaka Takano
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Acoustic microscope system
- Patent number 5,211,059
- Issue date May 18, 1993
- Hitachi Construction Machinery Co., Ltd.
- Yasuo Hayakawa
- G01 - MEASURING TESTING
Information Patent Grant
Ultrasonic inspection apparatus
- Patent number 4,862,383
- Issue date Aug 29, 1989
- Hitachi Construction Machinery Co., Ltd.
- Chishio Koshimizu
- G01 - MEASURING TESTING
Information Patent Grant
Supersonic flaw detecting system
- Patent number 4,768,155
- Issue date Aug 30, 1988
- Hitachi Construction Machinery Co., Ltd.
- Yoshihiko Takishita
- B82 - NANO-TECHNOLOGY

Patents Applicationslast 30 patents

Information Patent Application
ROTARY TYPE CONSTRUCTION MACHINE AND CAB, EQUIPMENT HOUSING COVER A...
- Publication number 20020040820
- Publication date Apr 11, 2002
- YUTAKA TAKANO
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING