Inventor · disambiguated record
Nobumasa Umezawa
Also filed as: UMEZAWA NOBUMASA
3 granted patents·90 citations·filing 1986–1991
74Inventor score
Top patents by PatentIndex Score
3 records- 0189US4753423ASynthetic resin-coated spring and method for making sameNIPPON PETROCHEMICALS CO LTD·Filed 1986·Granted Jun 28, 1988·59 cites·15 claims
- 0262US5183634AHigh strength spring steelMITSUBISHI STEEL MFG·Filed 1991·Granted Feb 2, 1993·16 cites·1 claims
- 0361US5118469AHigh strength spring steelMITSUBISHI STEEL MFG·Filed 1991·Granted Jun 2, 1992·15 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →