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Staircase lift
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Patent number 4,756,387
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Issue date Jul 12, 1988
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Gerd Grass
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B66 - HOISTING LIFTING HAULING
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Vehicle seat
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Patent number 4,181,353
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Issue date Jan 1, 1980
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Gebr. Isringhausen
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Gerd Grass
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B60 - VEHICLES IN GENERAL
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Vehicle seat
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Patent number 4,181,355
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Issue date Jan 1, 1980
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Gebr. Isringhausen
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Gerd Grass
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B60 - VEHICLES IN GENERAL
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Vehicle seat
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Patent number 4,181,354
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Issue date Jan 1, 1980
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Gebr. Isringhausen
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Gerd Grass
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B60 - VEHICLES IN GENERAL