Inventor
Sumio Hagiwara
Inventor
Tokorozawa, JP
Overview
Patents· 5 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C08Kprimary
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients19%
H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers19%
G10KSound-producing devices14%
Y10TTechnical subjects covered by former us classification14%
C08LCompositions of macromolecular compounds10%
G11BInformation storage based on relative movement between record carrier and transducer10%
B29CShaping or joining of plastics5%
B29KIndexing scheme associated with subclasses b29b, b29c or b29d, relating to moulding materials or to materials for moulds, reinforcements, fillers or preformed parts, e.g. inserts5%
B29LIndexing scheme associated with subclass b29c, relating to particular articles5%
PatentTitleYear
5,233,664'Speaker system and method of controlling directivity thereof'19934,404,315'Molding compositions and diaphragms, arm pipes and head shells molded therefrom'19834,366,205'Tone-arm elements'19824,362,772'Vibratory elements for audio equipment'19824,343,376'Vibratory elements for audio equipment'1982Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1982–1993Patents assigned to PIONEER ELECTRONIC CORP (5)· patent assignee history
1982Based in Tokorozawa, JP· patent location history
1983Based in Ohmorinishi, JP· patent location history
1993Based in Saitama, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| PIONEER ELECTRONIC CORP | 5 | 1982–1993 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokorozawa, JP | 3 | 1982 |
| Saitama, JP | 1 | 1993 |
| Ohmorinishi, JP | 1 | 1983 |