Inventor · disambiguated record
Issei Hayakawa
Also filed as: HAYAKAWA ISSEI
8 granted patents·159 citations·filing 1979–1990
88Inventor score
Files withNGK INSULATORS LTD8
Top patents by PatentIndex Score
8 records- 0188US4273587APolycrystalline transparent spinel sintered body and a method for producing the sameNGK INSULATORS LTD·Filed 1979·Granted Jun 16, 1981·40 cites·3 claims
- 0275US5015608AHigh hardness silicon nitride sintered bodiesNGK INSULATORS LTD·Filed 1989·Granted May 14, 1991·25 cites·13 claims
- 0371US4810681AMethod of manufacturing dense cordieriteNGK INSULATORS LTD·Filed 1987·Granted Mar 7, 1989·23 cites·5 claims
- 0469US4820665ACeramic sintered bodies and a process for manufacturing the sameNGK INSULATORS LTD·Filed 1987·Granted Apr 11, 1989·19 cites·26 claims
- 0568US5017531ASilicon nitride ceramic sintered bodiesNGK INSULATORS LTD·Filed 1990·Granted May 21, 1991·20 cites·4 claims
- 0668US5002907AHomogenous silicon nitride sintered bodyNGK INSULATORS LTD·Filed 1990·Granted Mar 26, 1991·21 cites·3 claims
- 0743US4742759ACeramic insert cast pistonNGK INSULATORS LTD·Filed 1987·Granted May 10, 1988·10 cites·20 claims
- 0827US4871697AMethod of producing homogeneous silicon nitride sintered bodiesNGK INSULATORS LTD·Filed 1988·Granted Oct 3, 1989·1 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →