Masao Iwasa

Person

Ichikawa, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Single inverter controller for elevator hoist and door motors
- Patent number 6,481,533
- Issue date Nov 19, 2002
- Otis Elevator Company
- Masao Iwasa
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Traction type elevator
- Patent number 5,564,530
- Issue date Oct 15, 1996
- Otis Elevator Company
- Atsushi Iwakiri
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Traction-type elevator
- Patent number 5,533,595
- Issue date Jul 9, 1996
- Otis Elevator Company
- Eiji Narumi
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Brake control system in elevator control apparatus
- Patent number 5,247,140
- Issue date Sep 21, 1993
- Otis Elevator Company
- Masao Iwasa
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Offset correction circuit of PWM inverter
- Patent number 5,105,352
- Issue date Apr 14, 1992
- Otis Elevator Company
- Masao Iwasa
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Alternating current motor control system with emergency control res...
- Patent number 5,070,290
- Issue date Dec 3, 1991
- Otis Elevator Company
- Masao Iwasa
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Clipper circuit for power transistor circuit and inverter circuit u...
- Patent number 5,070,426
- Issue date Dec 3, 1991
- Otis Elevator Company
- Masao Iwasa
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Elevator power source device
- Patent number 5,058,710
- Issue date Oct 22, 1991
- Otis Elevator Company
- Masao Iwasa
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
PWM inverter control unit
- Patent number 4,994,951
- Issue date Feb 19, 1991
- Otis Elevator Company
- Masao Iwasa
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Motor control apparatus
- Patent number 4,870,334
- Issue date Sep 26, 1989
- Otis Elevator Company
- Masao Iwasa
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Masao Iwasa

Person

Patents Grantslast 30 patents

Single inverter controller for elevator hoist and door motors

Traction type elevator

Traction-type elevator

Brake control system in elevator control apparatus

Offset correction circuit of PWM inverter

Alternating current motor control system with emergency control res...

Clipper circuit for power transistor circuit and inverter circuit u...

Elevator power source device

PWM inverter control unit

Motor control apparatus