Inventor
Tomoaki Ishifuji
Inventor
Tokyo, JP
Overview
Patents· 40 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Bprimary
H04BTransmission25%
H04WWireless communication networks16%
G01SRadio direction-finding13%
H04LTransmission of digital information, e.g. telegraphic communication13%
G06KGraphical data reading8%
Y02DClimate change mitigation technologies in information and communication technologies [ict], i.e. information and communication technologies aiming at the reduction of their own energy use5%
H03MCoding4%
H04JMultiplex communication4%
G06QInformation and communication technology [ict] specially adapted for administrative, commercial, financial, managerial or supervisory purposes3%
G07CTime or attendance registers3%
PatentTitleYear
8,310,995'Systems and methods for wireless communication using SDMA'20127,969,347'Method for measuring distance and position using spread spectrum signal, and an equipment using the method'20117,711,376'Method of providing location service using CDMA-based cellular phone system, a method of measuring location and location system'20107,663,532'Method for measuring distance and position using spread spectrum signal, and an equipment using the method'20107,660,288'Radio communication device'20107,609,197'Method for measuring distance and position using spread spectrum signal, and an equipment using the method'20097,319,684'System and method for wireless communication using a management server and access points'20087,233,581'Digital radio communication system for multi-application'20077,209,765'Wireless data communication system, wireless data communication method and communication apparatus'20077,116,709'Communication method of contactless ID card and integrated circuit used in communication method'20067,016,665'Charging method and terminal equipment in the information and communication network system'20066,963,269'Contactless IC card'20056,900,753'Method for measuring distance and position using spread spectrum signal, and an equipment using the method'20056,889,051'Method and apparatus for measuring transmitting time offset of a base station'20056,865,394'Location detection method, location detection system and location detection program'20056,765,959'Communication method of contactless ID card and integrated circuit used in communication method'20046,731,905'Fixed wireless access system and apparatus therefor'20046,731,602'Packet communication system and packet communication apparatus'20046,704,547'Wireless communication base station transmission timing offset correction system'20046,675,007'Charging method and terminal equipment in the information and communication network system'20046,671,649'Position calculation method and position calculation apparatus'20036,657,579'Method for measuring distance and position using spread spectrum signal, and an equipment using the method'20036,570,490'Contactless IC card'20036,556,943'Position calculation method and position calculation apparatus'20036,527,177'Automatic identification equipment and IC cards'20036,508,400'Automatic identification equipment and IC cards'20036,459,402'Method for measuring distance and position using spectrum signal, and an equipment using the method'20026,456,830'Diversity wireless communication method and its wireless communication apparatus'20026,388,562'Contactless IC card communication system and related method'20026,308,054'Diversity wireless communication method and its wireless communication apparatus'20016,249,669'Diversity wireless communication method and its wireless communication apparatus'20016,084,905'Frequency hopped wireless communication system and communication equipment using a preamble field and information transfer field succeeding the preamble field'20006,084,888'Communication method and communication equipment'20006,061,389'Frequency-hopping communication system and communication station'20006,014,406'Frequency-hopped wireless communication system and mobile wireless terminal'20006,010,075'Moving object identification method and apparatus'20005,862,142'Frequency hopping wireless communication system and communication equipment'19995,655,219'Wireless LAN system capable of re-transmission under management of a base station device to a destination mobile terminal device'19975,559,804'Wireless communication system and wireless terminal device using fixed length communication frame'19965,537,414'Method of wireless communication between base station and mobile station and multiple access communication system'1996Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1996–2012Patents assigned to HITACHI LTD (40)· patent assignee history
1996–2012Based in Tokyo, JP· patent location history
2000Patents assigned to HITACHI COMPUTER ENG (1)· patent assignee history
2000–2004Based in Suginami-ku, JP· patent location history
2002Patents assigned to DENSO CORP (1)· patent assignee history
2012Patents assigned to HAYASE SHIGENORI (1)· patent assignee history
2012Patents assigned to ISHIFUJI TOMOAKI (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 40 | 1996–2012 |
| DENSO CORP | 1 | 2002 |
| HAYASE SHIGENORI | 1 | 2012 |
| HITACHI COMPUTER ENG | 1 | 2000 |
| ISHIFUJI TOMOAKIself | 1 | 2012 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 38 | 1996–2012 |
| Suginami-ku, JP | 2 | 2000–2004 |