Isao Fukushima

Person

Fujisawa, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Video signal preamplifier circuit
- Patent number 4,956,729
- Issue date Sep 11, 1990
- Hitachi, Ltd.
- Tomishige Yatsugi
- G11 - INFORMATION STORAGE
Information Patent Grant
Multi-channel inverter circuit
- Patent number 4,847,742
- Issue date Jul 11, 1989
- Hitachi Video Engineering, Inc.
- Shin-ichi Ohashi
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Slow-motion device of magnetic recording and reproducing apparatus
- Patent number 4,774,598
- Issue date Sep 27, 1988
- Hitachi, Ltd.
- Masataka Sekiya
- G11 - INFORMATION STORAGE
Information Patent Grant
Auto-tracking apparatus of a magnetic recording/reproducing apparatus
- Patent number 4,757,394
- Issue date Jul 12, 1988
- Hitachi, Ltd.
- Kaneyuki Okamoto
- G11 - INFORMATION STORAGE
Information Patent Grant
Still picture recording system with noise detection and frame count...
- Patent number 4,737,864
- Issue date Apr 12, 1988
- Hitachi Microcomputer Eng. Co.
- Masataka Sekiya
- G11 - INFORMATION STORAGE
Information Patent Grant
Integrated filter circuit having switchable selected parallel filte...
- Patent number 4,724,407
- Issue date Feb 9, 1988
- Hitachi, Ltd.
- Kuniaki Miura
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
A recording circuit having means to automatically set the recording...
- Patent number 4,713,700
- Issue date Dec 15, 1987
- Hitachi, Ltd.
- Kazuyoshi Kuwahara
- G11 - INFORMATION STORAGE
Information Patent Grant
Apparatus for multiplex recording and reproduction of audio and vid...
- Patent number 4,691,246
- Issue date Sep 1, 1987
- Hitachi, Ltd.
- Kuniaki Miura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Switching regulator system for a motor driving circuit
- Patent number 4,682,096
- Issue date Jul 21, 1987
- Hitachi, Ltd.
- Hideo Nishijima
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Magnetic recording apparatus with recording of first and second sou...
- Patent number 4,672,468
- Issue date Jun 9, 1987
- Hitachi Microcomputer Engineering Co., Ltd.
- Yoshinori Okada
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Integrated circuit with a phase-locked loop
- Patent number 4,667,168
- Issue date May 19, 1987
- Hitachi Video Engineering Co., Ltd.
- Makoto Shiomi
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Integrated filter circuit with variable frequency characteristics
- Patent number 4,667,120
- Issue date May 19, 1987
- Hitachi, Ltd.
- Yoshinori Okada
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Apparatus for driving brushless motor
- Patent number 4,651,067
- Issue date Mar 17, 1987
- Hitachi, Ltd.
- Takayasu Ito
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Vertical contour emphasis de-emphasis circuit
- Patent number 4,647,960
- Issue date Mar 3, 1987
- Hitachi, Ltd.
- Kuniaki Miura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Auto-tracking method and apparatus of a magnetic recording/reproduc...
- Patent number 4,613,914
- Issue date Sep 23, 1986
- Hitachi Microcomputer Hitachi, Ltd.
- Yasunori Kobori
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording and reproduction system
- Patent number 4,607,293
- Issue date Aug 19, 1986
- Hitachi, Ltd.
- Yoshinori Okada
- G11 - INFORMATION STORAGE
Information Patent Grant
Frequency-voltage converter
- Patent number 4,605,901
- Issue date Aug 12, 1986
- Hitachi, Ltd.
- Yasunori Kobori
- G11 - INFORMATION STORAGE
Information Patent Grant
FM signal demodulation circuit
- Patent number 4,591,798
- Issue date May 27, 1986
- Hitachi, Ltd.
- Kuniaki Miura
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Multiplex magnetic recording and reproduction system
- Patent number 4,591,924
- Issue date May 27, 1986
- Hitachi, Ltd.
- Kuniaki Miura
- G11 - INFORMATION STORAGE
Information Patent Grant
Bipolar transistor circuit with FET constant current source
- Patent number 4,590,438
- Issue date May 20, 1986
- Hitachi, Ltd.
- Isao Fukushima
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Speed and phase control system
- Patent number 4,543,516
- Issue date Sep 24, 1985
- Hitachi, Ltd.
- Yasunori Kobori
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Characteristic switching circuit
- Patent number 4,521,750
- Issue date Jun 4, 1985
- Hitachi, Ltd.
- Isao Fukushima
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Motor control apparatus
- Patent number 4,518,901
- Issue date May 21, 1985
- Hitachi, Ltd.
- Isao Fukushima
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Power supply for plural brushless DC motors
- Patent number 4,503,369
- Issue date Mar 5, 1985
- Hitachi, Ltd.
- Hideo Nishijima
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Motor driving circuit
- Patent number 4,494,056
- Issue date Jan 15, 1985
- Hitachi, Ltd.
- Hideo Nishijima
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method and apparatus for magnetic recording and reproducing
- Patent number 4,482,926
- Issue date Nov 13, 1984
- Hitachi, Ltd.
- Hideo Nishijima
- G11 - INFORMATION STORAGE
Information Patent Grant
Signal voltage dividing circuit
- Patent number 4,460,953
- Issue date Jul 17, 1984
- Hitachi, Ltd.
- Isao Fukushima
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Electronic editing control apparatus for a video tape recorder
- Patent number 4,358,797
- Issue date Nov 9, 1982
- Hitachi, Ltd.
- Hideo Nishijima
- G11 - INFORMATION STORAGE
Information Patent Grant
Automatic gain control apparatus for a motor servo system
- Patent number 4,338,554
- Issue date Jul 6, 1982
- Hitachi, Ltd.
- Isao Fukushima
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Drive system for a motor
- Patent number 4,307,326
- Issue date Dec 22, 1981
- Hitachi, Ltd.
- Isao Fukushima
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Isao Fukushima

Person

Patents Grantslast 30 patents

Video signal preamplifier circuit

Multi-channel inverter circuit

Slow-motion device of magnetic recording and reproducing apparatus

Auto-tracking apparatus of a magnetic recording/reproducing apparatus

Still picture recording system with noise detection and frame count...

Integrated filter circuit having switchable selected parallel filte...

A recording circuit having means to automatically set the recording...

Apparatus for multiplex recording and reproduction of audio and vid...

Switching regulator system for a motor driving circuit

Magnetic recording apparatus with recording of first and second sou...

Integrated circuit with a phase-locked loop

Integrated filter circuit with variable frequency characteristics

Apparatus for driving brushless motor

Vertical contour emphasis de-emphasis circuit

Auto-tracking method and apparatus of a magnetic recording/reproduc...

Magnetic recording and reproduction system

Frequency-voltage converter

FM signal demodulation circuit

Multiplex magnetic recording and reproduction system

Bipolar transistor circuit with FET constant current source

Speed and phase control system

Characteristic switching circuit

Motor control apparatus

Power supply for plural brushless DC motors

Motor driving circuit

Method and apparatus for magnetic recording and reproducing

Signal voltage dividing circuit

Electronic editing control apparatus for a video tape recorder

Automatic gain control apparatus for a motor servo system

Drive system for a motor