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Inventor

Isao Yamamuro

Inventor
Saitama, JP

Overview

3→
Patents
1982–1984
Patent span
Electricity
Primary field (CPC H)

Patents· 3 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 transducers60%
G10KSound-producing devices20%
Y10TTechnical subjects covered by former us classification20%
PatentTitleYear
4,477,699'Mechanical two-way loudspeaker'19844,472,834'Loudspeaker system'19844,351,412'Diaphragm for acoustic instruments and method of manufacturing the same'1982

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1982–1984Patents assigned to PIONEER ELECTRONIC CORP (3)· patent assignee history
1982Based in Tokorozawa, JP· patent location history
1984Based in Saitama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
PIONEER ELECTRONIC CORP31982–1984
Locations
LocationPatentsSpan
Saitama, JP21984
Tokorozawa, JP11982