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Patent applications and USPTO patent grants for Hayashi; Mitsutoshi.The latest application filed is for "method for injecting lubricant or back-filling material into a space between the outside of double-wall pipes and the ground in the pipe-jacking method and an apparatus therefor".
Patent | Date |
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Method for injecting lubricant or back-filling material into a space between the outside of double-wall pipes and the ground in the pipe-jacking method and an apparatus therefor Grant 5,527,135 - Hayashi , et al. June 18, 1 | 1996-06-18 |
Method for controlling the direction of a shield tunneling machine and an apparatus therefor Grant 5,501,548 - Hayashi , et al. March 26, 1 | 1996-03-26 |
Method for injecting lubricant and filler in the pipe-jacking method Grant 5,484,232 - Hayashi , et al. January 16, 1 | 1996-01-16 |
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