Inventor · disambiguated record
Hisayoshi Usui
Also filed as: USUI HISAYOSHI
11 granted patents·131 citations·filing 1989–2003
90Inventor score
Files withNEC CORP11
Top patents by PatentIndex Score
11 records- 0178US6895220B2Mobile communication device capable of carrying out both indirect and direct communicationNEC CORP·Filed 2001·Granted May 17, 2005·26 cites·15 claims
- 0273US6615060B1Communication device effectively controlling power supply, method of controlling power supply, and mediumNEC CORP·Filed 2000·Granted Sep 2, 2003·20 cites·17 claims
- 0362US6469583B1PLL control circuit for digital oscillation frequency control and control method adopted in the sameNEC CORP·Filed 2000·Granted Oct 22, 2002·13 cites·14 claims
- 0459US7233783B2Mobile telephone system capable of effectively utilizing GPS information even if direct reception by a mobile telephone apparatus is difficultNEC CORP·Filed 2003·Granted Jun 19, 2007·13 cites·3 claims
- 0557US7209767B2Cellular phone suppressing degradation of receiving sensitivityNEC CORP·Filed 2003·Granted Apr 24, 2007·9 cites·16 claims
- 0653US7197136B1Digital portable telephone setNEC CORP·Filed 2000·Granted Mar 27, 2007·3 cites·15 claims
- 0751US5239683ACellular telephone system capable of reducing im distortion at portable telephoneNEC CORP·Filed 1990·Granted Aug 24, 1993·21 cites·2 claims
- 0840US6954648B2Mobile telephone system capable of effectively utilizing GPS information even if direct reception by a mobile telephone apparatus is difficultNEC CORP·Filed 2001·Granted Oct 11, 2005·2 cites·6 claims
- 0939US6625468B1Digital portable telephone unit and method for playing back voice/sound in the same unitNEC CORP·Filed 2000·Granted Sep 23, 2003·0 cites·8 claims
- 1037US4916729AMobile station for an automobile telephone systemNEC CORP·Filed 1989·Granted Apr 10, 1990·18 cites·4 claims
- 1133US6269128B1Clock recovery control in differential detectionNEC CORP·Filed 1998·Granted Jul 31, 2001·6 cites·24 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →