Inventor

Kazuyuki Nagatsuma

Inventor

Hachioji, JP

Overview

12→

Patents

1977–1992

Patent span

Physics

Primary field (CPC G)

Patents· 12 as inventor

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

G01Rprimary

G01RMeasuring electric variables20%

C30BSingle-crystal growth10%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein10%

H03HImpedance networks, e.g. resonant circuits10%

H10FInorganic semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation10%

H10NElectric solid-state devices not otherwise provided for10%

G01HMeasurement of mechanical vibrations or ultrasonic, sonic or infrasonic waves5%

G02BOptical elements, systems or apparatus5%

G10KSound-producing devices5%

Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution5%

PatentTitleYear

5,098,851'Fabricating a semiconductor photodetector by annealing to smooth the PN junction'1992 4,816,890'Optoelectronic device'1989 4,737,015'Optical waveguide having a silicon oxi-nitride layer'1988 4,631,402'Optical electric-field measuring apparatus'1986 4,604,577'Temperature-compensated magnetic field measuring instrument'1986 4,595,853'Apparatus for and method of determining properties of saw substrates'1986 4,581,579'Optical magnetic-field measuring apparatus having improved temperature characteristics'1986 4,570,064'Optical D.C. electric-field measuring apparatus with optic sensing means exhibiting both electrooptic and photoelectric effects'1986 4,490,641'Three electrode piezoelectric ceramic resonator'1984 4,333,842'Piezoelectric single crystal and surface acoustic wave element employing the same'1982 4,243,541'Piezoelectric ceramics'1981 4,001,127'Process of preparing single crystals of strontium barium niobate'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977Patents assigned to AGENCY IND SCIENCE TECHN (1)· patent assignee history

1977Based in Kokubunji, JP· patent location history

1981–1992Patents assigned to HITACHI LTD (10)· patent assignee history

1981–1992Based in Hachioji, JP· patent location history

1986–1988Patents assigned to HITACHI CABLE (4)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	10	1981–1992
HITACHI CABLE	4	1986–1988
AGENCY IND SCIENCE TECHN	1	1977

Locations

Location	Patents	Span
Hachioji, JP	11	1981–1992
Kokubunji, JP	1	1977