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Patent applications and USPTO patent grants for Hayasaka; Tadao.The latest application filed is for "process for the preparation of sintered alloys for valve mechanism parts for internal combustion engines".
Patent | Date |
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Process for the preparation of sintered alloys for valve mechanism parts for internal combustion engines Grant 4,588,441 - Ikenoue , et al. May 13, 1 | 1986-05-13 |
Ferro-sintered alloys Grant 4,552,590 - Nakata , et al. November 12, 1 | 1985-11-12 |
Method of the preparation of high density sintered alloys based on iron and copper Grant 4,437,890 - Hayasaka , et al. March 20, 1 | 1984-03-20 |
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