Robert L. Null

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Willow Wood, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Coil pipe trailer
- Patent number 6,419,424
- Issue date Jul 16, 2002
- Null's Machine & Mfg., Inc.
- Robert L. Null
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Grant
Trailer brake system with dual piston calipers
- Patent number 5,819,886
- Issue date Oct 13, 1998
- Robert L. Null
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Trailer brake system with multiple point caliper unit mounting
- Patent number 5,622,241
- Issue date Apr 22, 1997
- Robert L. Null
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Trailer brake system with release apparatus
- Patent number 5,551,538
- Issue date Sep 3, 1996
- Robert L. Null
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Trailer brake system with release apparatus
- Patent number 5,411,120
- Issue date May 2, 1995
- Robert L. Null
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Trailer brake system with release apparatus
- Patent number 5,316,110
- Issue date May 31, 1994
- Robert L. Null
- B60 - VEHICLES IN GENERAL