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Inventor

Seiichi Ishikawa

Inventor
Hirakata, JP

Overview

18→
Patents
1984–2021
Patent span
Electricity
Primary field (CPC H)

Patents· 18 as inventor

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

H04Rprimary
H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers14%
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds7%
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients7%
C08LCompositions of macromolecular compounds7%
H03GControl of amplification7%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h107%
Y10TTechnical subjects covered by former us classification7%
C09JAdhesives5%
C25DProcesses for the electrolytic or electrophoretic production of coatings5%
H01LSemiconductor devices5%
PatentTitleYear
11,014,548Vehicle control system, vehicle control method, and storage medium20219,805,998'Liquid sealing material and electronic component using same'20179,748,158'Liquid sealing material and electronic component using same'20178,981,233'Conductive member and method for producing the same'20158,698,002'Conductive member and method for producing the same'20148,586,467'Method of mounting electronic component and mounting substrate'20138,499,925'Conveying roller and method of making the same'20136,005,671'Facsimile system'19995,636,034'Data transmitting/receiving apparatus operating in a user-selected one of a line specifying mode and a free-line searching mode'19975,073,946'Thin speaker having an enclosure with an open portion and a closed portion'19915,051,942'Method and apparatus for calculating filter factors'19915,023,913'Apparatus for changing a sound field'19914,899,390'Thin speaker having an enclosure within an open portion and a closed portion'19904,896,285'Calculation of filter factors for digital filter'19904,888,808'Digital equalizer apparatus enabling separate phase and amplitude characteristic modification'19894,722,009'Tone restoring apparatus'19884,484,383'Method of manufacturing a speaker diaphragm'19844,426,556'Electrodynamic loudspeaker'1984

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1984–1991Patents assigned to MATSUSHITA ELECTRIC INDUSTRIAL CO LTD (9)· patent assignee history
1984–1991Based in Osaka, JP· patent location history
1988–1991Based in Hirakata, JP· patent location history
1997–1999Patents assigned to RICOH KK (2)· patent assignee history
2013–2014Patents assigned to ISHIKAWA SEIICHI (3)· patent assignee history
2013–2017Patents assigned to NAMICS CORP (3)· patent assignee history
2013–2017Based in Niigata, JP· patent location history
2014–2015Patents assigned to MITSUBISHI SHINDO KK (2)· patent assignee history
2014–2015Based in Aizuwakamatsu, JP· patent location history
2021Based in Wako, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD91984–1991
ISHIKAWA SEIICHIself32013–2014
NAMICS CORP32013–2017
MITSUBISHI SHINDO KK22014–2015
RICOH KK21997–1999
Locations
LocationPatentsSpan
Hirakata, JP41988–1991
Osaka, JP41984–1991
Niigata, JP32013–2017
Aizuwakamatsu, JP22014–2015
Wako, JP12021