Inventor · disambiguated record
Tomoaki Ishifuji
Also filed as: ISHIFUJI TOMOAKI
40 granted patents·3 pending applications·2,065 citations·filing 1993–2010
98Inventor score
Top patents by PatentIndex Score
43 records- 0198US5537414AMethod of wireless communication between base station and mobile station and multiple access communication systemHITACHI LTD·Filed 1993·Granted Jul 16, 1996·387 cites·25 claims
- 0297US6704547B2Wireless communication base station transmission timing offset correction systemHITACHI LTD·Filed 2001·Granted Mar 9, 2004·78 cites·8 claims
- 0391US6459402B1Method for measuring distance and position using spectrum signal, and an equipment using the methodHITACHI LTD·Filed 2000·Granted Oct 1, 2002·66 cites·21 claims
- 0490US6900753B2Method for measuring distance and position using spread spectrum signal, and an equipment using the methodHITACHI LTD·Filed 2003·Granted May 31, 2005·57 cites·17 claims
- 0590US6731905B2Fixed wireless access system and apparatus thereforHITACHI LTD·Filed 2001·Granted May 4, 2004·47 cites·6 claims
- 0689US6865394B2Location detection method, location detection system and location detection programHITACHI LTD·Filed 2002·Granted Mar 8, 2005·81 cites·13 claims
- 0787US6084888ACommunication method and communication equipmentHITACHI LTD·Filed 1998·Granted Jul 4, 2000·94 cites·11 claims
- 0887US5862142AFrequency hopping wireless communication system and communication equipmentHITACHI LTD·Filed 1995·Granted Jan 19, 1999·104 cites·15 claims
- 0986US7319684B2System and method for wireless communication using a management server and access pointsHITACHI LTD·Filed 2003·Granted Jan 15, 2008·43 cites·19 claims
- 1086US6249669B1Diversity wireless communication method and its wireless communication apparatusHITACHI LTD·Filed 2000·Granted Jun 19, 2001·44 cites·7 claims
- 1186US6014406AFrequency-hopped wireless communication system and mobile wireless terminalHITACHI LTD·Filed 1996·Granted Jan 11, 2000·97 cites·27 claims
- 1286US5655219AWireless LAN system capable of re-transmission under management of a base station device to a destination mobile terminal deviceHITACHI LTD·Filed 1994·Granted Aug 5, 1997·165 cites·26 claims
- 1384US7209765B1Wireless data communication system, wireless data communication method and communication apparatusHITACHI LTD·Filed 2006·Granted Apr 24, 2007·11 cites·7 claims
- 1483US6508400B1Automatic identification equipment and IC cardsHITACHI LTD·Filed 2000·Granted Jan 21, 2003·61 cites·3 claims
- 1583US6061389AFrequency-hopping communication system and communication stationHITACHI LTD·Filed 1994·Granted May 9, 2000·79 cites·20 claims
- 1682US5559804AWireless communication system and wireless terminal device using fixed length communication frameHITACHI LTD·Filed 1994·Granted Sep 24, 1996·139 cites·7 claims
- 1781US6889051B2Method and apparatus for measuring transmitting time offset of a base stationHITACHI LTD·Filed 2002·Granted May 3, 2005·47 cites·19 claims
- 1881US6570490B1Contactless IC cardHITACHI LTD·Filed 1998·Granted May 27, 2003·61 cites·3 claims
- 1980US8310995B2Systems and methods for wireless communication using SDMAMURAI SHINJI·Filed 2007·Granted Nov 13, 2012·9 cites·16 claims
- 2080US6731602B1Packet communication system and packet communication apparatusHITACHI LTD·Filed 1999·Granted May 4, 2004·92 cites·16 claims
- 2179US6084905AFrequency hopped wireless communication system and communication equipment using a preamble field and information transfer field succeeding the preamble fieldHITACHI LTD·Filed 1996·Granted Jul 4, 2000·79 cites·14 claims
- 2276US6765959B1Communication method of contactless ID card and integrated circuit used in communication methodHITACHI LTD·Filed 1999·Granted Jul 20, 2004·44 cites·13 claims
- 2374US6963269B2Contactless IC cardHITACHI LTD·Filed 2003·Granted Nov 8, 2005·17 cites·20 claims
- 2471US6675007B2Charging method and terminal equipment in the information and communication network systemHITACHI LTD·Filed 2002·Granted Jan 6, 2004·14 cites·4 claims
- 2571US6657579B2Method for measuring distance and position using spread spectrum signal, and an equipment using the methodHITACHI LTD·Filed 2002·Granted Dec 2, 2003·17 cites·5 claims
- 2671US6556943B2Position calculation method and position calculation apparatusHITACHI LTD·Filed 2001·Granted Apr 29, 2003·25 cites·10 claims
- 2768US7016665B2Charging method and terminal equipment in the information and communication network systemHITACHI LTD·Filed 2002·Granted Mar 21, 2006·11 cites·4 claims
- 2867US7609197B2Method for measuring distance and position using spread spectrum signal, and an equipment using the methodHITACHI LTD·Filed 2005·Granted Oct 27, 2009·4 cites·16 claims
- 2964US6527177B1Automatic identification equipment and IC cardsHITACHI LTD·Filed 2000·Granted Mar 4, 2003·9 cites·2 claims
- 3063US6456830B2Diversity wireless communication method and its wireless communication apparatusHITACHI LTD·Filed 2001·Granted Sep 24, 2002·10 cites·4 claims
- 3161US6010075AMoving object identification method and apparatusHITACHI LTD·Filed 1997·Granted Jan 4, 2000·25 cites·10 claims
- 3260US7711376B2Method of providing location service using CDMA-based cellular phone system, a method of measuring location and location systemHITACHI LTD·Filed 2001·Granted May 4, 2010·6 cites·23 claims
- 3360US6671649B2Position calculation method and position calculation apparatusHITACHI LTD·Filed 2003·Granted Dec 30, 2003·13 cites·6 claims
- 3454US7663532B2Method for measuring distance and position using spread spectrum signal, and an equipment using the methodHITACHI LTD·Filed 2007·Granted Feb 16, 2010·1 cites·11 claims
- 3554US2009285184A1Wireless communication system and mobile terminalHITACHI LTD·Filed 2009·Application pending·0 cites
- 3653US7116709B2Communication method of contactless ID card and integrated circuit used in communication methodHITACHI LTD·Filed 2004·Granted Oct 3, 2006·3 cites·15 claims
- 3753US6388562B1Contactless IC card communication system and related methodDENSO CORP·Filed 1999·Granted May 14, 2002·20 cites·6 claims
- 3852US7233581B2Digital radio communication system for multi-applicationHITACHI LTD·Filed 2001·Granted Jun 19, 2007·2 cites·2 claims
- 3950US2005078633A1Wireless communication system and mobile terminalFiled 2004·Application pending·0 cites
- 4048US7969347B2Method for measuring distance and position using spread spectrum signal, and an equipment using the methodHITACHI LTD·Filed 2010·Granted Jun 28, 2011·0 cites·8 claims
- 4148US7660288B2Radio communication deviceHITACHI LTD·Filed 2006·Granted Feb 9, 2010·0 cites·6 claims
- 4246US6308054B2Diversity wireless communication method and its wireless communication apparatusHITACHI LTD·Filed 2000·Granted Oct 23, 2001·3 cites·3 claims
- 4340US2001051527A1Wireless position measurement terminal and wireless position measurement systemFiled 2001·Application pending·0 cites
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →