Donald H. Ward

Person

Glen Ellyn, IL, US

People

Patents Grantslast 30 patents

Information Patent Grant
Solid state current controlled interruption system
- Patent number 5,216,352
- Issue date Jun 1, 1993
- Square D Company
- George H. Studtmann
- G01 - MEASURING TESTING
Information Patent Grant
Fail-resistant solid state interruption system
- Patent number 5,170,310
- Issue date Dec 8, 1992
- Square D Company
- George H. Studtmann
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Multiplex submersible pump telemetry system
- Patent number 4,631,536
- Issue date Dec 23, 1986
- Hughes Tool Company
- Donald H. Ward
- E21 - EARTH DRILLING MINING
Information Patent Grant
Submersible pump telemetry system
- Patent number 4,581,613
- Issue date Apr 8, 1986
- Hughes Tool Company
- Donald H. Ward
- E21 - EARTH DRILLING MINING
Information Patent Grant
Power tongs control arrangement
- Patent number 4,202,225
- Issue date May 13, 1980
- Loren B. Sheldon
- E21 - EARTH DRILLING MINING
Information Patent Grant
Computer-controlled oil drilling rig having drawworks motor and bra...
- Patent number 4,187,546
- Issue date Feb 5, 1980
- BJ-Hughes Inc.
- James P. Heffernan
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Elevator load control arrangement for a computer-controlled oil dri...
- Patent number 4,139,891
- Issue date Feb 13, 1979
- BJ-Hughes Inc.
- Loren B. Sheldon
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Velocity control arrangement for a computer-controlled oil drilling...
- Patent number 4,128,888
- Issue date Dec 5, 1978
- BJ-Hughes Inc.
- Loren B. Sheldon
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Automated pipe handling system
- Patent number 4,042,123
- Issue date Aug 16, 1977
- Loren B. Sheldon
- E21 - EARTH DRILLING MINING

Donald H. Ward

Person

Patents Grantslast 30 patents

Solid state current controlled interruption system

Fail-resistant solid state interruption system

Multiplex submersible pump telemetry system

Submersible pump telemetry system

Power tongs control arrangement

Computer-controlled oil drilling rig having drawworks motor and bra...

Elevator load control arrangement for a computer-controlled oil dri...

Velocity control arrangement for a computer-controlled oil drilling...

Automated pipe handling system