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Inventor

Hiroshi Kawahara

Inventor
Tokyo, JP

Overview

59→
Patents
1980–2020
Patent span
General tagging of new technological developments
Primary field (CPC Y)

Patents· 59 as inventor

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

Y10Tprimary
Y10TTechnical subjects covered by former us classification17%
G11BInformation storage based on relative movement between record carrier and transducer11%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests10%
G03BApparatus or arrangements for taking photographs or for projecting or viewing them5%
G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices5%
H03HImpedance networks, e.g. resonant circuits5%
C22CAlloys3%
C23CCoating metallic material3%
F16HGearing2%
G01PMeasuring linear or angular speed, acceleration, deceleration, or shock2%
PatentTitleYear
10,828,694Casting device, method for detecting leakage of refrigerant in casting device, and leakage detection device202010,821,365Non-transitory computer-readable recording medium and method for controlling communication between a server device and a terminal device202010,550,978Joining structure and joining method thereof202010,502,753Rolling bearing unit for wheel support201910,444,253Rolling bearing unit for wheel support201910,406,444Program, information processing apparatus, and control method201910,386,253Vehicle wheel supporting rolling bearing unit201910,359,102Friction roller-type reduction gear201910,161,489Friction-roller-type reduction gear201810,145,420Joint structure and joining method thereof20188,656,798'Linear actuator'20148,610,337'Piezoelectric device and method for manufacturing same'20138,429,800'Methods for manufacturing piezoelectric vibrating pieces'20138,089,200'Piezoelectric vibrating devices and methods for manufacturing same'20127,587,328'Transaction adjusting device'20097,067,963'Surface acoustic wave device'20067,014,902'Optical disc and method for manufacturing the same'20067,008,683'Optical disc and method for manufacturing the same'20067,008,682'Optical disc and method for manufacturing the same'20066,852,198'Resin composition, water-resistant/moisture-proof paper, containing the same, and process for producing the same'20056,750,592'Surface acoustic wave filter and surface acoustic wave filter apparatus'20046,720,845'Saw filter device and package for accommodating the same'20046,605,341'Functional film having specific surface dispersion ratio'20036,518,501'Electronic part and method of assembling the same'20036,395,224'Magnesium alloy and method of producing the same'20026,309,699'Method of producing a metallic part exhibiting excellent oxidation resistance'20016,056,525'Vane compressor'20005,980,659'Surface-treated metallic part and processing method thereof'19995,808,833'Magnetic disk apparatus with protective films'19985,805,380'Overcoat magnetic head slider having overcoat and magnetic disk device'19985,532,041'Magnetic recording media and method for making them'19965,298,094'Aluminum alloy casting having high strength and high toughness and process for producing the same'19945,222,431'Electrical stamp device capable of displaying an image layout, and which uses a stencil paper'19935,188,395'Waterproof recording material having ground patterns and its manufacturing method'19935,111,237'Image forming apparatus'19925,089,838'Pressure developing device'19925,081,484'Image recording medium and detecting device therefor'19925,043,210'Magnetic recording media having two magnetic layers; the first for recording a baseboard signal and the second for recording a superimposed surface and signal'19914,996,552'Image exposure device for exposing photosensitive recording medium to color image lights'19914,984,455'System for detecting speed of engine for vehicle'19914,945,374'Pressure developing device'19904,937,110'Laminated material for hot and cold cups and its manufacturing method'19904,884,501'Pressure developing apparatus'19894,855,280'Developer sheet'19894,772,922'Copying apparatus'19884,493,569'Type wheel changing mechanism in a printer'19854,491,069'Printing hammer driver mechanism'19854,460,653'Magnetic recording medium'19844,442,177'Alkyl ether methylolmelamine coating composition, coating process and transparent product'19844,434,277'Polyol for a polyurethane prepared by reacting an epoxide with the reaction product of a phenol, an aromatic amine, an aldehyde and a dialkanolamine'19844,431,702'Magnetic recording medium'19844,423,453'Magnetic recording medium'19834,414,288'Magnetic recording medium'19834,410,590'Magnetic recording medium'19834,391,877'Magnetic recording medium'19834,370,383'Magnetic recording medium'19834,367,263'Magnetic recording medium'19834,326,958'Permselective membrane'19824,187,377'Halogen-containing s-triazine compound'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1983–1984Patents assigned to TDK ELECTRONICS CO LTD (7)· patent assignee history
1983–2020Based in Tokyo, JP· patent location history
1983–1996Based in Saku, JP· patent location history
1984–2006Patents assigned to TDK CORP (7)· patent assignee history
1985–1993Patents assigned to BROTHER IND LTD (10)· patent assignee history
1988–1993Based in Nishikasugai-gun, JP· patent location history
1991–2002Based in Aichi, JP· patent location history
2012–2020Patents assigned to KAWAHARA HIROSHI (5)· patent assignee history
2014–2020Patents assigned to NSK LTD (7)· patent assignee history
2014–2019Based in Fujisawa, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
BROTHER IND LTD101985–1993
NSK LTD72014–2020
TDK CORP71984–2006
TDK ELECTRONICS CO LTD71983–1984
KAWAHARA HIROSHIself52012–2020
Locations
LocationPatentsSpan
Tokyo, JP181983–2020
Fujisawa, JP62014–2019
Aichi, JP51991–2002
Nishikasugai-gun, JP51988–1993
Saku, JP41983–1996