Inventor

Keiichi Umehara

Inventor
Kawasaki, JP

Overview

5→
Patents
1991–2021
Patent span
Performing operations
Primary field (CPC B)

Patents· 5 as inventor

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

G01Dprimary
G01DMeasuring not specially adapted for a specific variable43%
B41JTypewriters29%
B62DMotor vehicles14%
H04NPictorial communication, e.g. television14%

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1991–1993Patents assigned to TOKAI RIKA CO LTD (3)· patent assignee history
1991–1993Based in Aichi, JP· patent location history
1993Based in Niwa-gun, JP· patent location history
2021Patents assigned to CANON KK (2)· patent assignee history
2021Based in Kawasaki, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
TOKAI RIKA CO LTD31991–1993
CANON KK22021
Locations
LocationPatentsSpan
Kawasaki, JP22021
Aichi, JP21991–1993
Niwa-gun, JP11993