Inventor
SEKIYA TETSUO
JP30 patents
⚠️ This page may combine multiple inventors who share the name “SEKIYA TETSUO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SONY CORP
17 patentsUS4167692ASep 11, 1979
Brush-less DC motor
SONY CORP71 citations96
US5872691AFeb 16, 1999
Thin film magnetic head, magnetoresistance effect magnetic head and composite magnetic head
SONY CORP18 citations92
US5822159AOct 13, 1998
Thin-film magnetic head, magnetoresistance effect magnetic head and composite magnetic head
SONY CORP41 citations92
US5313342AMay 17, 1994
Analog/digital compatible reproducing system
SONY CORP27 citations92
US5065390ANov 12, 1991
Optical playback head
SONY CORP28 citations92
US4729048AMar 1, 1988
Magnetic transducer combination with formatting, data, and servo heads
SONY CORP50 citations92
US4701815AOct 20, 1987
Tracking servo system for disc memory
SONY CORP35 citations92
US5260836ANov 9, 1993
Apparatus for reproducing digital and analog audio signals
SONY CORP23 citations90
US5424890AJun 13, 1995
Magnetoresistance effect type thin film head
SONY CORP8 citations74
US4757410AJul 12, 1988
Magnetoresistance effect for short and long wavelength recordings
SONY CORP15 citations74
US4673998AJun 16, 1987
Magnetic transducer head having series connected magnetroresistance effect sensing element with head output connected between the sensing elements
SONY CORP16 citations73
US4516179AMay 7, 1985
Magnetic transducer head utilizing magnetoresistance effect
SONY CORP11 citations73
US5145259ASep 8, 1992
Bearing system
SONY CORP7 citations72
US4713710ADec 15, 1987
Compact multiple magnetic head apparatus
SONY CORP13 citations70
US5436772AJul 25, 1995
Magnetic recording and reproducing apparatus having magneto-resistance effect element
SONY CORP8 citations68
US4524401AJun 18, 1985
Magnetic transducer head utilizing magneto resistance effect with a bias field and partial saturation
SONY CORP4 citations62
US5197806AMar 30, 1993
Bearing system
SONY CORP1 citations51
MITSUBISHI CHEM IND
6 patentsUS5063247ANov 5, 1991
Diphenylurea derivatives
MITSUBISHI CHEM IND18 citations82
US5126483AJun 30, 1992
1-phenylalkyl-3-phenylurea derivatives
MITSUBISHI CHEM IND6 citations71
US4668682AMay 26, 1987
2-Phenylalkyl-3-aminoalkyl-4(3H)-quinazolinone compound
MITSUBISHI CHEM IND16 citations71
US5332833AJul 26, 1994
β-oxo-β-benzenepropanethioamide compounds
MITSUBISHI CHEM IND7 citations70
US5202351AApr 13, 1993
1-phenylalkyl-3-phenylurea derivative
MITSUBISHI CHEM IND3 citations60
US5439927AAug 8, 1995
Imidazoyl-β-oxo-β-benzenepropanethiomide derivative, compositions and method of use thereof
MITSUBISHI CHEM IND2 citations59
MITSUBISHI YUKA PHARMA
3 patentsUS4352928AOct 5, 1982
5,6-Alkylenepyrimidine derivative
MITSUBISHI YUKA PHARMA30 citations88
US4189484AFeb 19, 1980
Antihypertensive quinazoline derivatives
MITSUBISHI YUKA PHARMA9 citations69
US4607034AAug 19, 1986
Quinazoline derivatives and pharmaceutical composition thereof
MITSUBISHI YUKA PHARMA6 citations58