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Inventor

Tsukasa Okai

Inventor
Kyoto, JP

Overview

4→
Patents
1979–1987
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.

B41Bprimary
B41BMachines or accessories for making, setting, or distributing type29%
G06KGraphical data reading29%
H04KSecret communication29%
G06TImage data processing or generation, in general14%
PatentTitleYear
4,700,402'Input method for graphic pattern data'19874,513,444'Method of compressing data'19854,305,152'Security communication system'19814,159,399'Security communication system using polarity inversion'1979

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1979–1981Patents assigned to TOKYO SHIBAURA ELECTRIC CO (2)· patent assignee history
1979–1981Based in Yokohama, JP· patent location history
1985–1987Patents assigned to DAINIPPON SCREEN MFG (2)· patent assignee history
1985–1987Based in Kyoto, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DAINIPPON SCREEN MFG21985–1987
TOKYO SHIBAURA ELECTRIC CO21979–1981
Locations
LocationPatentsSpan
Kyoto, JP21985–1987
Yokohama, JP21979–1981