Masahiro Koizumi

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Takasaki-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Hydraulic hammering device
- Patent number 11,207,769
- Issue date Dec 28, 2021
- Furukawa Rock Drill Co., Ltd.
- Masahiro Koizumi
- E21 - EARTH DRILLING MINING
Information Patent Grant
Two-piston hydraulic striking device
- Patent number 11,072,977
- Issue date Jul 27, 2021
- Furukawa Rock Drill Co., Ltd.
- Masahiro Koizumi
- E21 - EARTH DRILLING MINING
Information Patent Grant
Hydraulic hammering device
- Patent number 11,052,524
- Issue date Jul 6, 2021
- Furukawa Rock Drill Co., Ltd.
- Masahiro Koizumi
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Grant
Hydraulic hammering device
- Patent number 11,034,010
- Issue date Jun 15, 2021
- Furukawa Rock Drill Co., Ltd.
- Tsutomu Kaneko
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Grant
Hydraulic hammering device
- Patent number 10,493,610
- Issue date Dec 3, 2019
- Furukawa Rock Drill Co., Ltd.
- Masahiro Koizumi
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Grant
Drill rod, drill bit, and drilling tool
- Patent number 7,942,216
- Issue date May 17, 2011
- Mitsubishi Materials Corporation
- Masaya Hisada
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Hydraulic Hammering Device
- Publication number 20200391368
- Publication date Dec 17, 2020
- FURUKAWA ROCK DRILL CO., LTD.
- Masahiro Koizumi
- E21 - EARTH DRILLING MINING
Information Patent Application
Two-Piston Hydraulic Striking Device
- Publication number 20200181978
- Publication date Jun 11, 2020
- FURUKAWA ROCK DRILL CO., LTD.
- Masahiro Koizumi
- E21 - EARTH DRILLING MINING
Information Patent Application
Hydraulic Hammering Device
- Publication number 20190210205
- Publication date Jul 11, 2019
- Furukawa Rock Drill Co., Ltd.
- Tsutomu Kaneko
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Application
Hydraulic Hammering Device
- Publication number 20180207782
- Publication date Jul 26, 2018
- FURUKAWA ROCK DRILL CO., LTD.
- Masahiro Koizumi
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Application
DRILL ROD, DRILL BIT, AND DRILLING TOOL
- Publication number 20090260892
- Publication date Oct 22, 2009
- MITSUBISHI MATERIALS CORPORATION
- Masaya Hisada
- E21 - EARTH DRILLING MINING