Inventor

Keiichi Yoshizawa

Inventor

Tokyo, JP

Overview

35→

Patents

1977–1994

Patent span

Physics

Primary field (CPC G)

Patents· 35 as inventor

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

LOCD1primary

LOCD124%

G04BMechanically-driven clocks or watches15%

G11BInformation storage based on relative movement between record carrier and transducer15%

G04CElectromechanical clocks or watches12%

LOCD09%

A47LDomestic washing or cleaning6%

A01KAnimal husbandry3%

A47BTables3%

B65DContainers for storage or transport of articles or materials, e.g. bags, barrels, bottles, boxes, cans, cartons, crates, drums, jars, tanks, hoppers, forwarding containers3%

G01FMeasuring volume, volume flow, mass flow or liquid level3%

PatentTitleYear

5,319,819'Desk top cleaner'1994 5,285,549'Desk top cleaner'1994 D0336695'Desk top cleaner'1993 5,037,018'Automatic feeder'1991 D0313196'Hub for supporting a timepiece hand'1990 D0312592'Hub for supporting a timepiece hand'1990 4,782,956'Magnetic tape cassette wrapper'1988 4,748,602'Alarm mechanism'1988 4,727,526'Alarm on-off mechanism for alarm watch'1988 4,693,612'Alarm mechanism'1987 D0283458'Wrapping sheet for magnetic tape cassette'1986 D0282444'Video cassette case'1986 D0282445'Video cassette case'1986 D0279762'Wrapping sheet for magnetic tape cassette'1985 4,501,359'Casing for a video tape cassette'1985 D0276567'Wrapping sheet for a cassette'1984 D0276566'Wrapping sheet for a cassette'1984 D0275654'Case for a magnetic tape magazine'1984 D0266829'Packaging container'1982 D0266419'Magazine of magnetic tape'1982 D0266437'Label for a cassette holder'1982 D0263952'Demagnetizing device'1982 D0263794'Case for a magnetic tape magazine'1982 D0263060'Label for a cassette holder'1982 D0262877'Casette tape'1982 D0262876'Casette tape'1982 D0260339'Storage unit'1981 4,257,079'Apparatus for rewinding magnetic tape in video cassette'1981 D0258585'Magnetic head eraser'1981 D0258287'Video tape cassette'1981 4,223,613'Sectional rack'1980 4,218,722'Compact hand-held demagnetizing device'1980 4,175,374'Timepiece'1979 4,135,219'Demagnetizer for a magnetic head of a recording-reproducing device'1979 4,012,898'Rotary indicating plate type digital display device'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1994Patents assigned to SEIKOSHA KK (11)· patent assignee history

1977–1994Based in Tokyo, JP· patent location history

1979–1988Patents assigned to TDK ELECTRONICS CO LTD (20)· patent assignee history

1979–1988Based in Chiba, JP· patent location history

1984–1985Patents assigned to TDK CORP (4)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
TDK ELECTRONICS CO LTD	20	1979–1988
SEIKOSHA KK	11	1977–1994
TDK CORP	4	1984–1985

Locations

Location	Patents	Span
Tokyo, JP	18	1977–1994
Chiba, JP	17	1979–1988