LexDanaLexDanabeta
Inventor

Hiroshi Kuwahara

Inventor
Kodaira, JP

Overview

61→
Patents
1977–2019
Patent span
Electricity
Primary field (CPC H)

Patents· 61 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H04Qprimary
H04QSelecting23%
H04LTransmission of digital information, e.g. telegraphic communication20%
H04JMultiplex communication13%
H04BTransmission5%
H04WWireless communication networks5%
G06FElectric digital data processing5%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein3%
H04MTelephonic communication3%
G06QInformation and communication technology [ict] specially adapted for administrative, commercial, financial, managerial or supervisory purposes2%
G09GArrangements or circuits for control of indicating devices using static means to present variable information2%
PatentTitleYear
10,291,728Location information display system, portable communication terminal, vehicular communication device, and computer program product201910,037,450Information code image display system, information code image display terminal, information code image display program, server, and information code image generating program20189,313,716'Operation regulation method, operation regulation program product, mobile terminal, vehicular apparatus, and vehicular communication system'20169,244,328'Optical modulator and optical modulation control method'20169,069,224'Optical modulator and optical modulation control method'20158,903,239'Optical modulator and optical modulation control method'20148,761,548'Optical modulator and optical modulation control method'20148,557,327'Method for manufacturing gas diffusion layer for fuel cell'20138,224,879'Management system and management method for storage system'20127,509,466'Backup method for a copy pair using newly created logical volume via virtual server device'20097,384,258'Die for forming honeycomb structure, and method of manufacturing the same'20087,109,841'Surface-mount positive temperature coefficient thermistor and manufacturing method therefor'20067,058,062'Packet switching system having self-routing switches'20066,728,242'ATM cell switching system'20046,639,920'Distributed type switching system'20036,618,372'Packet switching system having-having self-routing switches'20036,546,011'ATM cell switching system'20036,501,774'Optical transmission apparatus for multiple wavelengths and optical transmission wavelength control method'20026,445,703'ATM cell switching system'20026,389,025'Distributed type switching system'20026,335,934'Distributed type switching system'20026,314,096'Packet switching system having self-routing switches'20016,304,570'Distributed type switching system'20016,285,675'ATM cell switching system'20016,215,788'ATM cell switching system'20016,016,317'ATM cell switching system'20006,005,867'Time-division channel arrangement'19995,999,537'Packet switching system having self-routing switches'19995,999,162'Graph displaying method and apparatus and processing operation monitoring apparatus'19995,995,510'Distributed type switching system'19995,838,770'Portable telephone system'19985,745,495'Apparatus for monitoring and controlling autonomous switching of trunk/subscriber lines in a distributed switching system'19985,740,156'Packet switching system having self-routing switches'19985,734,655'Distributed type switching system'19985,608,343'Circuit for varying read timing'19975,579,370'Portable telephone system'19965,513,177'Distributed switching system having at least one module'19965,469,189'Display apparatus and method with multi-window function'19955,379,451'Mobile communication system and location registration method in mobile communication system'19955,353,281'Intermittenceless switching system'1994RE034305'Switching system and method of construction thereof'19935,157,660'Communication system including portable terminals and fixed terminals'19925,128,981'Radio communication system and a portable wireless terminal'19925,111,323'Optical switching system'19925,043,979'Time-division channel arrangement'19914,964,119'Method and system for packet exchange'19904,947,388'Cell switching system of asynchronous transfer mode'19904,910,731'Switching system and method of construction thereof'19904,835,773'Duplicated equipment'19894,633,460'Time division switching system'19864,608,464'Interface circuit interconnecting a bidirectional two-wire line with unidirectional four-wire lines'19864,543,652'Time-division switching unit'19854,401,365'Rotary type optical switch'19834,401,922'Convergence distortion correction method and apparatus for color cathode-ray tube'19834,365,309'Digital differential analyzing processor'19824,337,518'Recursive-type digital filter with reduced round-off noise'19824,305,133'Recursive type digital filter'19814,107,754'Discharge gap device'19784,080,516'Multi-frequency signal receiver'19784,023,076'Discharge gap device'19774,012,667'Protective device for series capacitor'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1978Based in Amagasaki, JP· patent location history
1978–2012Patents assigned to HITACHI LTD (45)· patent assignee history
1978–2006Based in Kodaira, JP· patent location history
1982–1995Based in Hitachi, JP· patent location history
1994–1998Patents assigned to KOKUSAI ELECTRIC CO LTD (4)· patent assignee history
2012–2014Patents assigned to KUWAHARA HIROSHI (4)· patent assignee history
2014–2016Patents assigned to FUJITSU OPTICAL COMPONENTS LTD (4)· patent assignee history
2014–2016Based in Kawasaki, JP· patent location history
2016–2019Patents assigned to DENSO CORP (3)· patent assignee history
2018–2019Based in Kariya, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD451978–2012
FUJITSU OPTICAL COMPONENTS LTD42014–2016
KOKUSAI ELECTRIC CO LTD41994–1998
KUWAHARA HIROSHIself42012–2014
DENSO CORP32016–2019
Locations
LocationPatentsSpan
Kodaira, JP391978–2006
Kawasaki, JP42014–2016
Hitachi, JP41982–1995
Amagasaki, JP31977–1978
Kariya, JP22018–2019