Hiroshi OTA

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Anpachi-gun, JP

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Patents Grantslast 30 patents

Information Patent Grant
Drilling bit
- Patent number 12,163,380
- Issue date Dec 10, 2024
- MMC RYOTEC CORPORATION
- Hiroshi Ota
- E21 - EARTH DRILLING MINING
Information Patent Grant
Drilling tool
- Patent number 10,107,045
- Issue date Oct 23, 2018
- Mitsubishi Materials Corporation
- Kazuyoshi Nakamura
- E21 - EARTH DRILLING MINING
Information Patent Grant
Digging bit
- Patent number 10,006,251
- Issue date Jun 26, 2018
- MITSUBISHI MATERIALS CORPROATION
- Kazuyoshi Nakamura
- E21 - EARTH DRILLING MINING
Information Patent Grant
Drilling tool
- Patent number 9,869,134
- Issue date Jan 16, 2018
- Mitsubishi Materials Corporation
- Kazuyoshi Nakamura
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
DRILLING BIT
- Publication number 20230392448
- Publication date Dec 7, 2023
- MMC RYOTEC CORPORATION
- Hiroshi Ota
- E21 - EARTH DRILLING MINING
Information Patent Application
DRILLING TOOL
- Publication number 20170081923
- Publication date Mar 23, 2017
- MITSUBISHI MATERIALS CORPORATION
- Kazuyoshi NAKAMURA
- E21 - EARTH DRILLING MINING
Information Patent Application
DIGGING BIT
- Publication number 20160002979
- Publication date Jan 7, 2016
- Mitsubishi Materials Corporation
- Kazuyoshi NAKAMURA
- E21 - EARTH DRILLING MINING
Information Patent Application
DRILLING TOOL
- Publication number 20160002983
- Publication date Jan 7, 2016
- MITSUBISHI MATERIALS CORPORATION
- Kazuyoshi NAKAMURA
- E21 - EARTH DRILLING MINING