LexDanaLexDanabeta
Inventor

Masafumi Nakamura

Inventor
Yokohama, JP

Overview

58→
Patents
1976–2017
Patent span
Physics
Primary field (CPC G)

Patents· 58 as inventor

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

G11Bprimary
G11BInformation storage based on relative movement between record carrier and transducer29%
H04NPictorial communication, e.g. television17%
Y10TTechnical subjects covered by former us classification5%
B23PMetal-working not otherwise provided for4%
B29CShaping or joining of plastics3%
C08JWorking-up3%
G09GArrangements or circuits for control of indicating devices using static means to present variable information3%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems3%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry2%
B21DWorking or processing of sheet metal or metal tubes, rods or profiles without essentially removing material2%
PatentTitleYear
9,738,497'Jib attachment/detachment mechanism'20179,480,956'Hydrogen sulfide gas production plant and method for recovering and using waste hydrogen sulfide gas'20169,321,646'Hydrogen sulfide gas production plant system and method for recovering and using hydrogen sulfide gas'20169,288,289'Portable device maintenance support apparatus, system, and method'20169,013,056'Backup power source device and automobile equipped with same'20158,295,688'Transmitting and recording method, reproducing method, and reproducing apparatus of information and its recording medium'20128,236,088'Metal mold repair method and metal mold repair paste agent'20127,927,653'Metal mold repair method and metal mold repair paste agent'20117,830,035'Power supply unit'20107,805,062'Transmitting and recording method, reproducing method, and reproducing apparatus of information and its recording medium'20107,655,333'Sub-micron solid oxide electrolyte membrane in a fuel cell'20107,602,247'Variable gain amplifier and AC power supply device using the same'20097,565,061'Transmitting and recording method, reproducing method, and reproducing apparatus of information and its recording medium'20097,556,756'Production method of polyurethane foam molded article'20097,540,985'Method of producing a polyurethane foam molded article'20097,138,992'Method of calibrating luminance of display, driving circuit of display employing same method and portable electronic device provided with same driving circuit'20067,019,927'Information signal recording and playback method and apparatus therefor'20066,836,074'Organic electro-luminescence display driving system and mobile communication terminal used this system'20046,728,408'Water-mark embedding method and system'20046,693,966'Transmitting and recording method, reproducing method, and reproducing apparatus of information and its recording medium'20046,671,653'Semiconductor test system and monitor apparatus thereof'20036,657,831'Information signal recording and playback method and apparatus therefor'20036,552,711'Display device and information terminal'20036,549,579'Transmitting and recording method, reproducing method, and reproducing apparatus of information and its recording medium'20036,521,157'Method for fabricating press forming die and method for fabricating press forming punch'20036,484,609'Method of producing press-forming punch and die'20026,474,196'Method of producing press-forming punch and die'20026,438,172'Transmitting and recording method, reproducing method, and reproducing apparatus of information and its recording medium'20026,424,477'Information signal recording and playback method and apparatus therefor'20026,404,979'Optical disk and optical disk reproduction apparatus'20026,314,542'Information recording method, reproducing method, and reproducing apparatus'20016,308,003'Method of recording image data and method of reproducing information from optical disk'20016,181,664'Disk cartridge and disk device using the same'20016,108,299'Disk cartridge and disk device using the same'20006,075,763'Disk cartridge and disk device using the same'20006,076,184'Information recording method, reproducing method, and reproducing apparatus'20006,009,237'Optical disk and optical disk reproduction apparatus'19996,002,834'Optical disk having table relating sector address and time and optical disk reproducing apparatus'19995,992,437'Method for diluting acid or alkaline stock solution and apparatus therefor'19995,991,260'Disk cartridge and disk device using the same'19995,983,387'Information recording method, reproducing method, and reproducing apparatus'19995,974,581'Information recording method, reproducing method, and reproducing apparatus'19995,956,193'Information signal recording and playback method and apparatus therefor'19995,768,298'Information recording method, reproducing method and reproducing apparatus'19985,729,649'Methods and apparatus for recording data on a digital storage medium in a manner that facilitates the reading back of data during trick play operation'19985,687,275'Trick play data indentification methods and apparatus for use with digital video recording and playback devices'19975,623,344'Digital video recording device with trick play capability'19975,589,995'Header information of information signal recording and reproducing method and apparatus therefor'19965,583,650'Digital recording and playback device error correction methods and apparatus for use with trick play data'19965,227,928'Magnetic recording/reproducing apparatus which maintains a constant speed relation between a linearly moving tape and a rotationally moving head'19934,988,958'Amplitude-controlled trapezoidal wave generating circuit'19914,985,648'Switching output circuit with high speed operation and low power consumption'19914,947,312'Non-resonance type AC power source apparatus'19904,912,524'Digital signal transmission system having conversion means for reducing the light emission time of a light emitting diode'19904,675,855'Reproducing rate control apparatus for information recording disc'19874,581,728'Plural beam tracking servo including delay compensation'19864,580,255'Servo circuit for a signal reproducing apparatus'19863,988,406'Method of providing a fibrous thermoplastic resin for depolymerization thereof'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1986–2009Patents assigned to HITACHI LTD (32)· patent assignee history
1986–2012Based in Yokohama, JP· patent location history
1990–1991Patents assigned to MATSUSHITA ELECTRIC INDUSTRIAL CO LTD (3)· patent assignee history
1990–1991Based in Tsu, JP· patent location history
1996–1998Patents assigned to HITACHI AMERICA LTD (4)· patent assignee history
2002–2012Patents assigned to HONDA MOTOR CO LTD (6)· patent assignee history
2002–2003Based in Hamamatsu, JP· patent location history
2003–2006Patents assigned to NEC CORP (3)· patent assignee history
2003–2016Based in Tokyo, JP· patent location history
2009–2015Based in Mie, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD321986–2009
HONDA MOTOR CO LTD62002–2012
HITACHI AMERICA LTD41996–1998
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD31990–1991
NEC CORP32003–2006
Locations
LocationPatentsSpan
Yokohama, JP331986–2012
Tokyo, JP62003–2016
Mie, JP32009–2015
Hamamatsu, JP32002–2003
Tsu, JP31990–1991