Allen E. Bardwell

Follow

Person

Front Royal, VA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Top head drive and mast assembly for drill rigs
- Patent number 6,257,349
- Issue date Jul 10, 2001
- Allen Eugene Bardwell
- E21 - EARTH DRILLING MINING
Information Patent Grant
Security barrier apparatus
- Patent number 5,537,778
- Issue date Jul 23, 1996
- Trident Industries, Inc.
- Allen E. Bardwell
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Security barrier apparatus
- Patent number 5,452,542
- Issue date Sep 26, 1995
- Allen E. Bardwell
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Multiple blow percussion drill assembly with rapid field maintenanc...
- Patent number 5,022,474
- Issue date Jun 11, 1991
- Allen E. Bardwell
- E21 - EARTH DRILLING MINING
Information Patent Grant
Detachable shoe plates for large diameter drill bits
- Patent number 4,466,498
- Issue date Aug 21, 1984
- Allen E. Bardwell
- E21 - EARTH DRILLING MINING
Information Patent Grant
Gravity percussion drill with upper end cocking spring and method o...
- Patent number 4,440,245
- Issue date Apr 3, 1984
- Allen E. Bardwell
- E21 - EARTH DRILLING MINING