LexDanaLexDanabeta
Inventor

Masaaki Matsumoto

Inventor
Fujisawa, JP

Overview

70→
Patents
1984–2021
Patent span
Physics
Primary field (CPC G)

Patents· 70 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 transducer37%
H02KDynamo-electric machines5%
A63BApparatus for physical training, gymnastics, swimming, climbing, or fencing4%
F16GBelts, cables, or ropes, predominantly used for driving purposes4%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%
C09DCoating compositions, e.g. paints, varnishes or lacquers3%
F16CShafts3%
H01MProcesses or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy3%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution3%
C08JWorking-up2%
PatentTitleYear
11,047,822Sensor device202111,043,485Electronic device having semiconductor device with protective resistor202110,946,668Production system202110,778,052Synchronous reluctance type rotary electric machine202010,720,818Synchronous reluctance type rotary electric machine202010,637,310Synchronous reluctance type rotary electric machine202010,622,853Synchronous reluctance type rotary electric machine202010,554,081Synchronous reluctance rotary electric machine202010,037,042Valve control system and valve control method for steam turbine201810,023,756Solid drawing material20189,944,766Prepreg, metal-clad laminated board, and printed wiring board20189,206,308'Epoxy resin composition for prepreg, prepreg, and multilayer printed circuit board'20159,090,784'Solid drawing material and solid drawing tool'20157,474,504'Magnetic head heating element in a disk drive'20097,209,309'Magnetic disk apparatus and method of controlling the same'20077,164,556'Magnetic disk device and magnetic head slider'20077,085,103'Magnetic head slider with side pads which each have a width W and a length L, wherein W>L'20067,061,722'Magnetic head gimbal assembly and magnetic disk unit'20067,042,678'Magnetic head slider and magnetic disc unit'20067,038,883'Magnetic head slider, support therefor and magnetic disk unit'20066,963,464'Magnetic head heating element in a disk drive'20056,934,123'Magnetic disk device and magnetic head slider'20056,910,991'Stationary bike'20056,842,309'Magnetic head slider having optimized ratio of negative pressure bearing to a front or center step bearing'20056,798,605'Magnetic disk apparatus and method of controlling the same'20046,795,275'Magnetic disk device and magnetic head slider'20046,785,095'Magnetic disc apparatus with slider having specified location of action point of equivalent load'20046,760,193'Magnetic head gimbal assembly and magnetic disk unit'20046,744,598'Magnetic disk device and magnetic head slider'20046,744,600'Magnetic disk device and magnetic head slider'20046,741,427'Magnetic disk drive having arm displacement limit mechanism for shock resistance'20046,704,252'Method and apparatus for reproducing information data from partial CD-R'20046,690,543'Magnetic disk drive with air bearing surface pad on movable portion and method of controlling'20046,657,820'Magnetic head slider'20036,628,480'Magnetic head slider having optimized ratio of negative pressure recess to front step bearing'20036,618,225'Magnetic head supporting apparatus having thermally insulated IC mounted on an arm portion'20036,597,536'Magnetic head slider'20036,556,381'Magnetic disk device and magnetic head slider'20036,510,113'Recording apparatus, recording method, and recording medium carrying computer program for recording a signal'20036,498,702'Magnetic head supporting apparatus having thermally insulated read/write IC mounted on arm portions thereof'20026,493,179'Magnetic head gimbal assembly and magnetic disk unit'20026,493,188'Magnetic disc apparatus having slider which reduces variation in lift-up caused by change in air pressure'20026,450,910'Link plate for silent chains and method of producing the same'20026,445,544'Magnetic head gimbal assembly and magnetic disk unit'20026,373,666'Magnetic disk drive having arm displacement limit mechanism for shock resistance'2002D0444828'Running distance indicator for exercising machine'20016,157,519'Magnetic head gimbal assembly of a magnetic disk unit having a load point matched with the center of impact'20006,055,131'Magnetic head suspension having selected thicknesses for enhancing rigidity'20006,045,473'Plate for a silent chain'20005,989,141'Silent chain'19995,973,880'Negative pressure flying head slider having improved side rails construction'19995,835,305'Magnetic disk apparatus employing liquid bearing type or physical contact type magnetic head slider'19985,606,472'Disk unit'19975,601,515'Adjustable recumbent bicycle exerciser'19975,557,486'Thin external memory unit with hard disk'19965,530,605'Magnetic-head slider support mechanism and magnetic recording apparatus'19965,430,591'Negative pressure flying head slider having siderails with narrow width portion'19955,383,073'Magnetic head supporting apparatus having a fulcrum point of load support offset from a slider center in an air upstream direction'19955,294,786'Optical data card for an exerciser'19945,247,410'Magnetic disk apparatus using a rotary actuator for magnetic head positioning with reduced vibration'19935,230,673'Exerciser in which exercising load is controlled based on individual data stored in an optical data card'19934,975,342'Fuel cell'19904,948,271'Bearing structure with improved lubricating seals for supporting shaft element'19904,919,551'Bearing with improved lubrication seals'19904,883,371'Bearing system for a wheel'19894,767,680'Fuel cell'19884,718,881'Frictional transmission chain'19884,702,972'Electrolyte replenishing system for a laminated fuel cell'19874,521,731'Detector attachment arrangement'19854,479,693'Device for detachably attaching electric appliances'1984

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1984–2005Based in Sakai, JP· patent location history
1989–2002Based in Osaka, JP· patent location history
1993–2005Patents assigned to HITACHI LTD (28)· patent assignee history
1993–2005Patents assigned to CATEYE CO LTD (5)· patent assignee history
1995–2009Based in Odawara, JP· patent location history
2002–2007Based in Fujisawa, JP· patent location history
2004–2009Patents assigned to HITACHI GLOBAL STORAGE TECH (9)· patent assignee history
2020Patents assigned to TOSHIBA IND PRODUCTS & SYSTEMS CORP (5)· patent assignee history
2020Patents assigned to TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORP (5)· patent assignee history
2020Based in Mie, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD281993–2005
HITACHI GLOBAL STORAGE TECH92004–2009
CATEYE CO LTD51993–2005
TOSHIBA IND PRODUCTS & SYSTEMS CORP52020
TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORP52020
Locations
LocationPatentsSpan
Fujisawa, JP192002–2007
Odawara, JP161995–2009
Sakai, JP71984–2005
Osaka, JP41989–2002
Mie, JP32020