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Fifth wheel hitch plate
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Patent number D576923
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Issue date Sep 16, 2008
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SAF-Holland, Inc.
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Steven Dupay
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D12 - Transportation
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Force-sensing fifth wheel
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Patent number 6,739,611
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Issue date May 25, 2004
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The Holland Group, Inc.
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Jack L. Gisinger
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B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
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Force-sensing fifth wheel
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Patent number 6,302,424
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Issue date Oct 16, 2001
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Holland Hitch Company
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Jack L. Gisinger
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B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
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Pintle hook
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Patent number 5,332,250
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Issue date Jul 26, 1994
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Holland Hitch Company
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Gregory R. Thorwall
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B60 - VEHICLES IN GENERAL
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Fifth wheel assembly
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Patent number 4,443,025
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Issue date Apr 17, 1984
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Holland Hitch Company
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Samuel A. Martin
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B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS