Richard W. Roof

Person

Lexington, SC, US

People

Patents Grantslast 30 patents

Information Patent Grant
Motor controller with bi-modal turnoff circuits
- Patent number 5,173,848
- Issue date Dec 22, 1992
- Richard W. Roof
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Transient ride-through AC inverter
- Patent number 4,843,533
- Issue date Jun 27, 1989
- Square D Company
- Richard W. Roof
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Current regulated switching regulator for gating gate turnoff devices
- Patent number 4,791,350
- Issue date Dec 13, 1988
- Square D Company
- Richard W. Roof
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
DC bus shorting apparatus and method for polyphase AC inverter
- Patent number 4,720,776
- Issue date Jan 19, 1988
- Square D Company
- John C. Guyeska
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Pulse generating system
- Patent number 4,441,063
- Issue date Apr 3, 1984
- Square D Company
- Richard W. Roof
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Automatic fault protection system for power recovery control
- Patent number 4,308,491
- Issue date Dec 29, 1981
- Square D Company
- F. Carl Joyner
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Pre-step timer circuit for DC motor control
- Patent number 4,267,493
- Issue date May 12, 1981
- Square D Company
- Richard W. Roof
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Control system for multiple speed motor
- Patent number 4,249,118
- Issue date Feb 3, 1981
- Square D Company
- Richard W. Roof
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Richard W. Roof

Person

Patents Grantslast 30 patents

Motor controller with bi-modal turnoff circuits

Transient ride-through AC inverter

Current regulated switching regulator for gating gate turnoff devices

DC bus shorting apparatus and method for polyphase AC inverter

Pulse generating system

Automatic fault protection system for power recovery control

Pre-step timer circuit for DC motor control

Control system for multiple speed motor