Inventor

Kenzo Masuda

Inventor

Tokorozawa, JP

Overview

1977–2003

Patent span

Electricity

Primary field (CPC H)

Patents· 15 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 transducer19%

B82YSpecific uses or applications of nanostructures14%

H01FMagnets14%

H03KPulse technique14%

G11CStatic stores8%

H10DInorganic electric semiconductor devices8%

G01RMeasuring electric variables5%

H10BElectronic memory devices5%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%

Y10TTechnical subjects covered by former us classification5%

PatentTitleYear

6,661,606'Magnetic disk apparatus with magnetic head having upper and lower magnetic cores of an electroplated thin film'2003 6,490,131'Thin film magnetic head with electroplated Ni-Fe alloy thin film having small average crystal grain size range'2002 6,385,009'Thin film magnetic head and assembled construction thereof'2002 6,262,867'Thin film magnetic head with Ni-Fe alloy thin film'2001 6,118,628'Thin film magnetic head with Ni-Fe alloy thin film'2000 5,162,163'Magnetic recording medium having a lubricant film consisting of a mixture of two lubricants and which has two peaks of molecular weight'1992 5,079,062'Magnetic recording medium having a thin film magnetic layer formed over a non-magnetic substrate which has powder grains of the substrate disposed on its surface'1992 4,239,980'Integrated circuit having an operation voltage supplying depletion type MISFET of high breakdown voltage structure'1980 4,107,548'Ratioless type MIS logic circuit'1978 4,074,238'Semiconductor read-only memory'1978 4,069,427'MIS logic circuit of ratioless type'1978 4,069,430'MIS switching circuit capable of enduring high voltage'1978 4,053,791'Logic circuit of ratioless structure'1977 4,045,686'Voltage comparator circuit'1977 4,015,216'Frequency-voltage converter and a stabilized pulse generator using it'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–2003Patents assigned to HITACHI LTD (15)· patent assignee history

1977–1980Based in Tokorozawa, JP· patent location history

1992–2003Based in Odawara, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	15	1977–2003

Locations

Location	Patents	Span
Tokorozawa, JP	8	1977–1980
Odawara, JP	7	1992–2003