Hayakawa; Issei
Patent Applications and Registrations
Patent applications and USPTO patent grants for Hayakawa; Issei.The latest application filed is for "silicon nitride ceramic sintered bodies".
- Hayakawa; Issei - Nagoya JP
- Hayakawa; Issei - Tsushima JP
| Patent | Date |
|---|---|
| Silicon nitride ceramic sintered bodies Grant 5,017,531 - Ukai , et al. May 21, 1 | 1991-05-21 |
| High hardness silicon nitride sintered bodies Grant 5,015,608 - Matsuhisa , et al. May 14, 1 | 1991-05-14 |
| Ceramic sintered bodies and a process for manufacturing the same Grant 4,820,665 - Ukai , et al. April 11, 1 | 1989-04-11 |
| Ceramic insert cast piston Grant 4,742,759 - Hayakawa May 10, 1 | 1988-05-10 |
| Polycrystalline transparent spinel sintered body and a method for producing the same Grant 4,273,587 - Oda , et al. June 16, 1 | 1981-06-16 |
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