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Inventor

Sumio Ishihara

Inventor
Takatsuki, JP

Overview

2→
Patents
1991–2000
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.

H04Rprimary
H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers25%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h1025%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h1025%
Y10TTechnical subjects covered by former us classification25%
PatentTitleYear
6,122,385'Sound reproduction apparatus with stable feedback'20005,032,542'Method of mass-producing integrated circuit devices using strip lead frame'1991

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1991Patents assigned to SANYO ELECTRIC CO (1)· patent assignee history
1991Based in Gunma, JP· patent location history
2000Patents assigned to MATSUSHITA ELECTRIC INDUSTRIAL CO LTD (1)· patent assignee history
2000Based in Takatsuki, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD12000
SANYO ELECTRIC CO11991
Locations
LocationPatentsSpan
Takatsuki, JP12000
Gunma, JP11991