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Inventor

Yoshio Tatsumi

Inventor
Tokyo, JP

Overview

3→
Patents
1978
Patent span
Physics
Primary field (CPC G)

Patents· 3 as inventor

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

G04Bprimary
G04BMechanically-driven clocks or watches50%
G04CElectromechanical clocks or watches25%
Y10TTechnical subjects covered by former us classification25%
PatentTitleYear
4,114,365'Battery lead plate member for an electronic wrist watch'19784,102,123'Bearing for a timepiece train'19784,074,517'Gear train for a wrist watch'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978Patents assigned to SEIKO INSTR & ELECTRONICS (3)· patent assignee history
1978Based in Tokyo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
SEIKO INSTR & ELECTRONICS31978
Locations
LocationPatentsSpan
Tokyo, JP31978