Kaoru Totsuka

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Noise reducing apparatus
- Patent number 4,449,106
- Issue date May 15, 1984
- Victor Company of Japan, Ltd.
- Yukinobu Ishigaki
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Variable-directivity microphone device
- Patent number 4,412,097
- Issue date Oct 25, 1983
- Victor Company of Japan, Ltd.
- Yukinobu Ishigaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Variable directional microphone system
- Patent number 4,399,327
- Issue date Aug 16, 1983
- Victor Company of Japan, Limited
- Makoto Yamamoto
- G11 - INFORMATION STORAGE
Information Patent Grant
Noise reduction system having series connected low and high frequen...
- Patent number 4,363,007
- Issue date Dec 7, 1982
- Victor Company of Japan, Limited
- Yutaka Haramoto
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Variable-directivity microphone device
- Patent number 4,354,059
- Issue date Oct 12, 1982
- Victor Company of Japan, Ltd.
- Yukinobu Ishigaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE