Inventor

Akira Tsuzuki

Inventor

Tokorozawa, JP

Overview

31→

Patents

1977–2004

Patent span

Physics

Primary field (CPC G)

Patents· 31 as inventor

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

A61Lprimary

A61LMethods or apparatus for sterilising materials or objects in general13%

G09GArrangements or circuits for control of indicating devices using static means to present variable information11%

C11DDetergent compositions10%

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

G04GElectronic time-pieces10%

C10BDestructive distillation of carbonaceous materials for production of gas, coke, tar, or similar materials5%

H04NPictorial communication, e.g. television5%

A61PSpecific therapeutic activity of chemical compounds or medicinal preparations3%

C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds3%

G02BOptical elements, systems or apparatus3%

PatentTitleYear

6,806,243'Ophthalmic solution and contact lens solution'2004 6,544,953'Ophthalmic composition'2003 6,417,144'Solution for contact lenses'2002 6,320,008'Polymeric colorant and colored material for ocular lens using the colorant'2001 6,242,551'Polymeric colorant and colored material for ocular lens using the colorant'2001 6,177,480'Agent for contact lenses'2001 6,121,327'Contact lens disinfecting solution'2000 5,919,742'Contact lens cleaning material formed of a polymer'1999 4,663,670'Television receiver having a liquid crystal display device'1987 4,652,932'Liquid crystal display television receiver'1987 4,646,158'Liquid crystal television receiver'1987 4,500,441'Contact lens cleaning and storage composition'1985 4,465,999'Matrix driving method for electro-optical display device'1984 4,443,062'Multi-layer display device with nonactive display element groups'1984 4,440,662'Cleaning composition for contact lenses'1984 4,430,648'Combination matrix array display and memory system'1984 4,389,728'Frequency divider'1983 4,356,483'Matrix drive system for liquid crystal display'1982 4,345,612'Anesthetic gas control apparatus'1982 4,345,248'Liquid crystal display device with write-in capability'1982 4,300,137'Matrix driving method for electro-optical display device'1981 4,268,360'Temporary heat-proof apparatus for use in repairing coke ovens'1981 4,264,967'Unit time producing system'1981 4,259,202'Cleaning and preservative solution for contact lenses'1981 4,248,562'Coke guide car'1981 4,244,043'Frequency division system'1981 4,243,490'Radial cutter type cleaning apparatus for coke oven door bottom surface'1981 4,241,435'Electronic timepiece oscillator circuit'1980 4,232,510'Timepiece'1980 4,100,540'Method of driving liquid crystal matrix display device to obtain maximum contrast and reduce power consumption'1978 4,024,416'Method for controlling frequency of electrical oscillations and frequency standard for electronic timepiece'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1987Patents assigned to CITIZEN WATCH CO LTD (17)· patent assignee history

1977–1987Based in Tokyo, JP· patent location history

1980–1987Based in Tokorozawa, JP· patent location history

1981–1985Patents assigned to TOYO CONTACT LENS CO LTD (3)· patent assignee history

1981Patents assigned to KORITSU KIKAI KOGYO COMPANY LI (2)· patent assignee history

1981Patents assigned to KORITSU MACHINE IND LTD (1)· patent assignee history

1981–2004Based in Nagoya, JP· patent location history

1981Based in Yokohama, JP· patent location history

1999–2004Patents assigned to MENICON CO LTD (8)· patent assignee history

2002Based in Aichi, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
CITIZEN WATCH CO LTD	17	1977–1987
MENICON CO LTD	8	1999–2004
TOYO CONTACT LENS CO LTD	3	1981–1985
KORITSU KIKAI KOGYO COMPANY LI	2	1981
KORITSU MACHINE IND LTD	1	1981

Locations

Location	Patents	Span
Tokorozawa, JP	10	1980–1987
Nagoya, JP	9	1981–2004
Tokyo, JP	6	1977–1987
Yokohama, JP	3	1981
Aichi, JP	1	2002