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Lift axle suspension system
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Patent number 6,871,862
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Issue date Mar 29, 2005
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Watson & Chalin Manufacturing, Inc.
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Thomas N. Chalin
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B60 - VEHICLES IN GENERAL
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Steerable suspension system
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Patent number 6,398,239
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Issue date Jun 4, 2002
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Watson & Chalin Manufacturing, Inc.
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Thomas N. Chalin
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B60 - VEHICLES IN GENERAL
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Axle alignment system
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Patent number 6,131,930
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Issue date Oct 17, 2000
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Watson & Chalin Manufacturing, Inc.
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Thomas N. Chalin
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B60 - VEHICLES IN GENERAL
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Steerable suspension system
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Patent number 5,865,452
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Issue date Feb 2, 1999
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Watson & Chalin Manufacturing, Inc.
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Thomas N. Chalin
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B60 - VEHICLES IN GENERAL
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Bent tube steering axle assembly
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Patent number 5,213,352
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Issue date May 25, 1993
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Watson & Chalin Manufacturing, Inc.
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Thomas N. Chalin
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B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS