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Inventor

Ken Matsushita

Inventor
Tama, JP

Overview

5→
Patents
1986–2018
Patent span
Electricity
Primary field (CPC H)

Patents· 5 as inventor

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

H04Lprimary
H04LTransmission of digital information, e.g. telegraphic communication38%
B41FPrinting machines or presses13%
B41LApparatus or devices for manifolding, duplicating or printing for office or other commercial purposes13%
G06FElectric digital data processing13%
G11BInformation storage based on relative movement between record carrier and transducer13%
H04NPictorial communication, e.g. television13%
PatentTitleYear
9,979,541Content management system, host device and content key access method20187,664,021'Recording and reproducing apparatus and file transfer method'20107,336,671'Network relay apparatus and network relay method'20084,566,383'Winding apparatus for removing used stencil'19864,563,947'Ink detecting device for rotary printer'1986

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1986Patents assigned to DUPLO SEIKO CORP (2)· patent assignee history
1986Patents assigned to DUPLO SEIZO KK (2)· patent assignee history
1986Based in Wakayama, JP· patent location history
2008–2018Patents assigned to TOSHIBA KK (3)· patent assignee history
2008–2010Based in Tama, JP· patent location history
2018Based in Tokyo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
TOSHIBA KK32008–2018
DUPLO SEIKO CORP21986
DUPLO SEIZO KK21986
Locations
LocationPatentsSpan
Tama, JP22008–2010
Wakayama, JP21986
Tokyo, JP12018