Rikio Maruta

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Cross-connection network using time switch
- Patent number 5,144,620
- Issue date Sep 1, 1992
- NEC Corporation
- Yasutoshi Ishizaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cross-connection network using time switch
- Patent number 4,935,921
- Issue date Jun 19, 1990
- NEC Corporation
- Yasutoshi Ishizaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for converting an analog signal to a digital s...
- Patent number 4,684,925
- Issue date Aug 4, 1987
- NEC Corporation
- Rikio Maruta
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
System and method for ADPCM transmission of speech or like signals
- Patent number 4,554,670
- Issue date Nov 19, 1985
- NEC Corporation
- Shinichi Aiko
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Digital compandor having nonlinear companding characteristics
- Patent number 4,467,315
- Issue date Aug 21, 1984
- Nippon Electric Co., Ltd.
- Rikio Maruta
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Digital compandor having nonlinear companding characteristics
- Patent number 4,393,367
- Issue date Jul 12, 1983
- Nippon Electric Co., Ltd.
- Rikio Maruta
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
PCM Signal interface apparatus
- Patent number 4,392,234
- Issue date Jul 5, 1983
- Nippon Electric Co., Ltd.
- Rikio Maruta
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
2M-point discrete Fourier transform calculator comprising a pre-pro...
- Patent number 4,164,021
- Issue date Aug 7, 1979
- Nippon Electric Co., Ltd.
- Takao Nishitani
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Digital SSB-FDM communication system derived from a complex band-pa...
- Patent number 4,107,470
- Issue date Aug 15, 1978
- Nippon Electric Co., Ltd.
- Rikio Maruta
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Asynchronous PCM common decoding apparatus
- Patent number 4,099,029
- Issue date Jul 4, 1978
- Nippon Electric Co., Ltd.
- Rikio Maruta
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Rikio Maruta

Person

Patents Grantslast 30 patents

Cross-connection network using time switch

Cross-connection network using time switch

Method and apparatus for converting an analog signal to a digital s...

System and method for ADPCM transmission of speech or like signals

Digital compandor having nonlinear companding characteristics

Digital compandor having nonlinear companding characteristics

PCM Signal interface apparatus

2M-point discrete Fourier transform calculator comprising a pre-pro...

Digital SSB-FDM communication system derived from a complex band-pa...

Asynchronous PCM common decoding apparatus