Hirotoshi Shirasu

Person

Yokohama, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Control system with flag indicating two or less data inputs and cou...
- Patent number 5,185,873
- Issue date Feb 9, 1993
- Hitachi, Ltd.
- Yukihito Maejima
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Method and system for data driven information processing
- Patent number 4,901,274
- Issue date Feb 13, 1990
- Hitachi, Ltd.
- Yukihito Maejima
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Method and system for bidirectionally transmitting data
- Patent number 4,841,521
- Issue date Jun 20, 1989
- Hitachi, Ltd.
- Eiichi Amada
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Ring back tone transmission system
- Patent number 4,663,759
- Issue date May 5, 1987
- Hitachi, Ltd.
- Takuji Mukaemachi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Time division switching system
- Patent number 4,633,460
- Issue date Dec 30, 1986
- Hitachi, Ltd.
- Taihei Suzuki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Interface circuit interconnecting a bidirectional two-wire line wit...
- Patent number 4,608,464
- Issue date Aug 26, 1986
- Nippon Telegraph & Telephone Public Corporation
- Yuichi Morikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
PCM coder and decoder
- Patent number 4,603,417
- Issue date Jul 29, 1986
- Hitachi, Ltd.
- Hirotoshi Shirasu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Subscriber line interface circuit with complex impedance
- Patent number 4,558,185
- Issue date Dec 10, 1985
- Nippon Telegraph and Telephone Public Corp.
- Yuichi Morikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Time-division switching unit
- Patent number 4,543,652
- Issue date Sep 24, 1985
- Hitachi, Ltd.
- Eiichi Amada
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Signal processing apparatus for subscriber circuits
- Patent number 4,276,447
- Issue date Jun 30, 1981
- Hitachi, Ltd.
- Hirotoshi Shirasu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Time-division-multiplexed exchanger
- Patent number 4,261,051
- Issue date Apr 7, 1981
- Hitachi, Ltd.
- Makoto Ohnishi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Interpolative PCM decoder utilized for .mu.-law and A-law
- Patent number 4,231,022
- Issue date Oct 28, 1980
- Hitachi, Ltd.
- Hiroshi Kosugi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Hirotoshi Shirasu

Person

Patents Grantslast 30 patents

Control system with flag indicating two or less data inputs and cou...

Method and system for data driven information processing

Method and system for bidirectionally transmitting data

Ring back tone transmission system

Time division switching system

Interface circuit interconnecting a bidirectional two-wire line wit...

PCM coder and decoder

Subscriber line interface circuit with complex impedance

Time-division switching unit

Signal processing apparatus for subscriber circuits

Time-division-multiplexed exchanger

Interpolative PCM decoder utilized for .mu.-law and A-law