Inventor · disambiguated record
Hiroyoshi Matumura
Also filed as: MATUMURA HIROYOSHI
3 granted patents·79 citations·filing 1985–1985
74Inventor score
Files withHITACHI LTD3
Top patents by PatentIndex Score
3 records- 0180US4775980ADistributed-feedback semiconductor laser deviceHITACHI LTD·Filed 1985·Granted Oct 4, 1988·28 cites·11 claims
- 0267US4784451AWaveguide optical switchesHITACHI LTD·Filed 1985·Granted Nov 15, 1988·27 cites·8 claims
- 0363US4695122AOptical thin film waveguideHITACHI LTD·Filed 1985·Granted Sep 22, 1987·24 cites·14 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →