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Inventor

Toko Ohtsubo

Inventor
Yokohama, JP

Overview

2→
Patents
1990–1994
Patent span
Electricity
Primary field (CPC H)

Patents· 2 as inventor

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

H04Mprimary
H04MTelephonic communication67%
G06FElectric digital data processing33%
PatentTitleYear
5,335,339'Equipment and method for interactive testing and simulating of a specification of a network system'19944,969,182'Method of telephone call wherein status data inhibits calls and indicates to the caller the reason the called subscriber is unavailable'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990–1994Patents assigned to HITACHI LTD (2)· patent assignee history
1990–1994Based in Yokohama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD21990–1994
Locations
LocationPatentsSpan
Yokohama, JP21990–1994