Inventor · disambiguated record
Shigeharu Onuma
Also filed as: ONUMA SHIGEHARU
5 granted patents·51 citations·filing 1981–1990
78Inventor score
Files withHITACHI LTD5
Top patents by PatentIndex Score
5 records- 0177US5204202AElectrophotographic photosensitive element comprising a protective layer with a porous surface impregnated with lubricantHITACHI LTD·Filed 1990·Granted Apr 20, 1993·24 cites·23 claims
- 0261US5073466AElectrophotographic member containing a fluorine-containing lubricating agent and process for producing the sameHITACHI LTD·Filed 1989·Granted Dec 17, 1991·12 cites·29 claims
- 0350US4405703AElectrophotographic plate having an age-hardened aluminum substrate and process for producing the sameHITACHI LTD·Filed 1981·Granted Sep 20, 1983·7 cites·8 claims
- 0442US4430404AElectrophotographic photosensitive material having thin amorphous silicon protective layerHITACHI LTD·Filed 1982·Granted Feb 7, 1984·8 cites·13 claims
- 0526US4791040AMultilayered electrophotographic photosensitive memberHITACHI LTD·Filed 1987·Granted Dec 13, 1988·0 cites·18 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →