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Inventor

Shizuo Yamaguchi

Inventor
Sayama, JP

Overview

4→
Patents
1976–2001
Patent span
Physics
Primary field (CPC G)

Patents· 4 as inventor

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

G06Fprimary
G06FElectric digital data processing22%
G06KGraphical data reading22%
B41JTypewriters11%
G04DApparatus or tools specially designed for making or maintaining clocks or watches11%
G11CStatic stores11%
H01MProcesses or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy11%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution11%
PatentTitleYear
6,306,538'Portable information device'20016,060,789'Power supply switching circuit for portable equipment'20005,289,209'Printing head for ink-jet printer'19943,946,591'Method of and system for detecting the rate of an electronic timepiece'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–2001Patents assigned to CITIZEN WATCH CO LTD (4)· patent assignee history
1976Based in Tokyo, JP· patent location history
1994–2001Based in Sayama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
CITIZEN WATCH CO LTD41976–2001
Locations
LocationPatentsSpan
Sayama, JP31994–2001
Tokyo, JP11976