Colin Arlott

Follow

Person

Bredon, GB

People

Patents Grantslast 30 patents

Information Patent Grant
Devices for imparting rotary motion
- Patent number 4,725,197
- Issue date Feb 16, 1988
- NL Industries, Inc.
- Michael K. Russell
- E21 - EARTH DRILLING MINING
Information Patent Grant
Down-hole devices for imparting rotary motion
- Patent number 4,714,403
- Issue date Dec 22, 1987
- NL Industries, Inc.
- Michael K. Russell
- E21 - EARTH DRILLING MINING