Inventor

Yasuo Ohtsuka

Inventor

Chigasaki, JP

Overview

14→

Patents

1987–2008

Patent span

Physics

Primary field (CPC G)

Patents· 14 as inventor

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

G02Fprimary

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein21%

G03BApparatus or arrangements for taking photographs or for projecting or viewing them21%

H04NPictorial communication, e.g. television21%

G11BInformation storage based on relative movement between record carrier and transducer14%

B01JChemical or physical processes, e.g. catalysis or colloid chemistry3%

B25JManipulators3%

C01BNon-metallic elements3%

C10GCracking hydrocarbon oils3%

C10JProduction of producer gas, water-gas, synthesis gas from solid carbonaceous material, or mixtures containing these gases3%

Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution3%

PatentTitleYear

7,341,354'Display device and display optical system unit'2008 7,128,422'Display device and display optical system unit'2006 6,935,750'Display device and display optical system unit'2005 6,779,894'Display device and display optical system unit'2004 6,582,083'Display device and display optical system unit'2003 6,555,084'Method of decomposing ammonia gas'2003 6,410,477'Hydrogenation catalyst of carbon monoxide and method of manufacturing hydrogenation product'2002 6,394,608'Display device and display optical system unit'2002 6,181,664'Disk cartridge and disk device using the same'2001 6,108,299'Disk cartridge and disk device using the same'2000 6,075,763'Disk cartridge and disk device using the same'2000 5,991,260'Disk cartridge and disk device using the same'1999 4,848,983'Catalytic coal gasification by utilizing chlorides'1989 4,712,970'Method for handling a work in a robot system'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987–2008Patents assigned to HITACHI LTD (11)· patent assignee history

1987Based in Yokohama, JP· patent location history

1989–2003Patents assigned to UNIV TOHOKU (3)· patent assignee history

1989–2003Based in Sendai, JP· patent location history

1999–2008Based in Chigasaki, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	11	1987–2008
UNIV TOHOKU	3	1989–2003

Locations

Location	Patents	Span
Chigasaki, JP	10	1999–2008
Sendai, JP	3	1989–2003
Yokohama, JP	1	1987