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Patent applications and USPTO patent grants for Ohta; Ryozo.The latest application filed is for "method for blocking outflow of petroleum or the like due to damage to subsea petroleum well steel pipe or the like".
Patent | Date |
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Method For Blocking Outflow Of Petroleum Or The Like Due To Damage To Subsea Petroleum Well Steel Pipe Or The Like App 20120325490 - Ohta; Ryozo | 2012-12-27 |
Method For Blocking Outflow Of Petroleum Or The Like Due To Damage To Subsea Petroleum Well Stell Pipe Or The Like App 20120186813 - Ohta; Ryozo | 2012-07-26 |
Method of producing a channeled plastic pipe with closed channel ends Grant 4,474,726 - Ohta , et al. October 2, 1 | 1984-10-02 |
Method of forming a socket end on a plastic pipe and a molding device for use of the method Grant 4,279,853 - Ohta , et al. July 21, 1 | 1981-07-21 |
Tubular end structure of pipe Grant 4,034,994 - Ohta , et al. July 12, 1 | 1977-07-12 |
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