Inventor
Kaoru Totsuka
Inventor
Yokohama, JP
Overview
Patents· 5 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 transducers50%
H03GControl of amplification33%
G11BInformation storage based on relative movement between record carrier and transducer17%
PatentTitleYear
4,449,106'Noise reducing apparatus'19844,412,097'Variable-directivity microphone device'19834,399,327'Variable directional microphone system'19834,363,007'Noise reduction system having series connected low and high frequency emphasis and de-emphasis filters'19824,354,059'Variable-directivity microphone device'1982Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1982–1984Patents assigned to VICTOR COMPANY OF JAPAN (5)· patent assignee history
1982–1984Based in Yokohama, JP· patent location history
1982–1983Based in Tokyo, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| VICTOR COMPANY OF JAPAN | 5 | 1982–1984 |
Locations
| Location | Patents | Span |
|---|---|---|
| Yokohama, JP | 3 | 1982–1984 |
| Tokyo, JP | 2 | 1982–1983 |