Mitsui Sekitan Kogyo Kabushiki Kaisha
Patent Applications and Registrations
Patent applications and USPTO patent grants for Mitsui Sekitan Kogyo Kabushiki Kaisha.The latest application filed is for "double ranging drum cutter having bedrock sensor based on video image processing system".
- Mitsui Sekitan Kogyo Kabushiki Kaisha - Tokyo JP
- Mitsui Sekitan Kogyo Kabushiki Kaisha - Nihonbashi JP
| Patent | Date |
|---|---|
| Double ranging drum cutter having bedrock sensor based on video image processing system Grant 4,715,657 - Sato , et al. December 29, 1 | 1987-12-29 |
| Method of relieving earth pressure in a working area Grant 4,307,978 - Kimura , et al. December 29, 1 | 1981-12-29 |
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