Inventor

Yoshinori Hirai

Inventor

Yokohama, JP

Overview

1992–2018

Patent span

Physics

Primary field (CPC G)

Patents· 30 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 therein29%

H04NPictorial communication, e.g. television18%

G09GArrangements or circuits for control of indicating devices using static means to present variable information16%

G09FDisplaying8%

C09KMaterials for miscellaneous applications, not provided for elsewhere6%

B23QDetails, components, or accessories for machine tools, e.g. arrangements for copying or controlling4%

B24BMachines, devices, or processes for grinding or polishing4%

G05BControl or regulating systems in general4%

A61KPreparations for medical, dental or toiletry purposes2%

A61PSpecific therapeutic activity of chemical compounds or medicinal preparations2%

PatentTitleYear

9,982,014Tetrapeptide compound and method for producing same2018 9,096,523'Process for preparing cyclic amine compounds'2015 7,052,370'High-precision machining system'2006 6,654,082'Liquid crystal display element and color display device having particular transflector'2003 6,592,430'High-precision machining system'2003 6,346,774'Method of driving passive matrix liquid crystal display'2002 6,144,373'Picture display device and method of driving picture display device'2000 6,122,021'Liquid crystal display element and a projection type liquid crystal display apparatus'2000 6,018,378'Liquid crystal/polymer composite with high optical anisotropy and low dielectric anisotropy to lower hysteresis exhibiting transparent and light scattering states'2000 6,017,466'Liquid crystal optical element, liquid crystal display element and a projection type liquid crystal display apparatus'2000 5,953,002'Driving method for a liquid crystal display device'1999 5,900,857'Method of driving a liquid crystal display device and a driving circuit for the liquid crystal display device'1999 5,838,404'Display device with optical member having two parts in overlay relation to reflect light incident at particular angle'1998 5,831,586'Method of driving a picture display device'1998 5,774,101'Multiple line simultaneous selection method for a simple matrix LCD which uses temporal and spatial modulation to produce gray scale with reduced crosstalk and flicker'1998 5,754,260'Projection type color liquid crystal optical apparatus'1998 5,734,364'Method of driving a picture display device'1998 5,648,860'Projection type color liquid crystal optical apparatus'1997 5,386,306'Active matrix liquid crystal display element and projection type active matrix liquid crystal display device'1995 5,379,137'Liquid crystal display element and a projection type liquid crystal display apparatus'1995 5,331,446'Liquid crystal optical element and a laser projection apparatus using polymer dispersed liquid crystal'1994 5,283,675'Liquid crystal display element with electrode having concave-convex surface at liquid crystal side'1994 5,274,480'Projection type display apparatus having an aperture stop means including non-circular openings'1993 5,264,953'Liquid crystal display apparatus for providing a gray scale and a projection type liquid crystal display apparatus'1993 5,235,445'Liquid crystal optical element with liquid crystal in polymer matrix with particular modulus of elasticity'1993 5,216,531'Projection type active matrix polymer dispersed liquid crystal display apparatus with particles of liquid crystal material randomly oriented'1993 5,206,746'Transparent-scattering type optical device including a prism with a triangular longitudinal cross section'1993 5,196,952'Liquid crystal display element and a projection type liquid crystal display apparatus'1993 5,150,232'Active matrix liquid crystal display element and projection type active matrix liquid crystal display device'1992 5,103,327'Active matrix liquid crystal display element and a projection type active matrix liquid crystal display apparatus'1992

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1992–2000Patents assigned to ASAHI GLASS CO LTD (16)· patent assignee history

1992–2002Based in Yokohama, JP· patent location history

1993–2000Patents assigned to AG TECHNOLOGY CORP (8)· patent assignee history

2000–2003Patents assigned to OPTREX KK (3)· patent assignee history

2003–2006Patents assigned to MITSUBISHI ELECTRIC CORP (2)· patent assignee history

2003–2006Based in Tokyo, JP· patent location history

2003Based in Kanagawa, JP· patent location history

2015–2018Patents assigned to KANEKA CORP (2)· patent assignee history

2015–2018Based in Takasago, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
ASAHI GLASS CO LTD	16	1992–2000
AG TECHNOLOGY CORP	8	1993–2000
OPTREX KK	3	2000–2003
KANEKA CORP	2	2015–2018
MITSUBISHI ELECTRIC CORP	2	2003–2006

Locations

Location	Patents	Span
Yokohama, JP	25	1992–2002
Takasago, JP	2	2015–2018
Tokyo, JP	2	2003–2006
Kanagawa, JP	1	2003