Koji Ochi

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Iwamizawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Delay circuit for use in electric blasting system
- Patent number 4,984,519
- Issue date Jan 15, 1991
- Nippon Oil and Fats Company, Limited
- Koji Ochi
- F42 - AMMUNITION BLASTING
Information Patent Grant
Delay type electric detonator
- Patent number 4,899,658
- Issue date Feb 13, 1990
- Nippon Oil and Fats Company, Limited
- Koji Ochi
- F42 - AMMUNITION BLASTING
Information Patent Grant
Electric detonator of delay type
- Patent number 4,893,564
- Issue date Jan 16, 1990
- Nippon Oil & Fats Co., Ltd.
- Koji Ochi
- F42 - AMMUNITION BLASTING
Information Patent Grant
Delay circuit for electric blasting, detonating primer having delay...
- Patent number 4,825,765
- Issue date May 2, 1989
- Nippon Oil & Fats Co., Ltd.
- Koji Ochi
- F42 - AMMUNITION BLASTING