Inventor · disambiguated record
Tadasu Otsubo
Also filed as: OTSUBO TADASU
4 granted patents·237 citations·filing 1990–1999
82Inventor score
Technology areasH04N
Files withHITACHI LTD4
Top patents by PatentIndex Score
4 records- 0187US6249532B1Interactive chargeable communication system with billing system thereforHITACHI LTD·Filed 1999·Granted Jun 19, 2001·101 cites·39 claims
- 0284US6002694AInteractive chargeable communication system with billing system thereforHITACHI LTD·Filed 1995·Granted Dec 14, 1999·77 cites·12 claims
- 0370US5122885AMagnetic video recording/reproducing apparatus for video signals of different aspect ratios adapter unitHITACHI LTD·Filed 1990·Granted Jun 16, 1992·35 cites·19 claims
- 0463US5307171AVideo tape recorder/playerHITACHI LTD·Filed 1990·Granted Apr 26, 1994·24 cites·16 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →