Terry Lee Simpson

Follow

Person

Westminster, CA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Mine roof support and method in longwall mining of thick mineral seams
- Patent number 4,065,929
- Issue date Jan 3, 1978
- Atlantic Richfield Company
- Terry Lee Simpson
- E21 - EARTH DRILLING MINING
Information Patent Grant
Longwall mining of thick underground mineral seams
- Patent number 4,030,752
- Issue date Jun 21, 1977
- Atlantic Richfield Company
- Terry Lee Simpson
- E21 - EARTH DRILLING MINING
Information Patent Grant
Longwall mining with chain pillar recovery
- Patent number 3,999,804
- Issue date Dec 28, 1976
- Atlantic Richfield Company
- Terry Lee Simpson
- E21 - EARTH DRILLING MINING