Inventor · disambiguated record
Sayoko Oba
Also filed as: OBA SAYOKO
2 granted patents·6 citations·filing 1989–1990
51Inventor score
Technology areasG03G
Files withHITACHI LTD2
Top patents by PatentIndex Score
2 records- 0138US4977415AElectrostatic recording head, image recording apparatus, developing agent supplying device, display device and method of producing electrostatic recording headHITACHI LTD·Filed 1989·Granted Dec 11, 1990·4 cites·29 claims
- 0230US5144343AImage recording method and apparatusHITACHI LTD·Filed 1990·Granted Sep 1, 1992·2 cites·6 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →