Matthew Shofner

Follow

Person

Fort Bend, TX, US

People

Patents Grantslast 30 patents

Information Patent Grant
Percussive down-the-hole hammer for rock drilling, and a one-way va...
- Patent number 6,499,544
- Issue date Dec 31, 2002
- Sandvik AB
- Matthew F. Shofner
- E21 - EARTH DRILLING MINING
Information Patent Grant
Percussive down-the-hole hammer for rock drilling, a top sub used t...
- Patent number 6,454,026
- Issue date Sep 24, 2002
- Sandvik AB
- Matthew Floyd Shofner
- E21 - EARTH DRILLING MINING
Information Patent Grant
Percussive down-the-hole rock drilling hammer and piston therefor
- Patent number 6,131,672
- Issue date Oct 17, 2000
- Sandvik AB
- Rainer Beccu
- E21 - EARTH DRILLING MINING
Information Patent Grant
Down-the-hole hammer drill having reverse circulation
- Patent number 5,407,021
- Issue date Apr 18, 1995
- Sandvik Rock Tools, Inc.
- Robert F. Kane
- E21 - EARTH DRILLING MINING