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Inventor

Masaaki Maejima

Inventor
Nagano, JP

Overview

3→
Patents
1984–2010
Patent span
Performing operations
Primary field (CPC B)

Patents· 3 as inventor

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

B42Fprimary
B42FSheets temporarily attached together33%
G04BMechanically-driven clocks or watches33%
H01FMagnets33%
PatentTitleYear
7,780,342'Spring device and timepiece'20104,940,353'Holder for paper-keeping bags'19904,442,419'Static induction apparatus'1984

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1984Patents assigned to HITACHI LTD (1)· patent assignee history
1984Based in Hitachi, JP· patent location history
1990Patents assigned to KING JIM CO LTD (1)· patent assignee history
1990Based in Tokyo, JP· patent location history
2010Patents assigned to SEIKO EPSON CORP (1)· patent assignee history
2010Based in Nagano, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD11984
KING JIM CO LTD11990
SEIKO EPSON CORP12010
Locations
LocationPatentsSpan
Nagano, JP12010
Tokyo, JP11990
Hitachi, JP11984