Access ramp for handicapped persons

Material or article handling equipment – Conveying – lifting – or transferring article – Ramp

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D03462560

REFERENCES:
patent: D311798 (1990-10-01), Boots, et al.
patent: D315046 (1991-02-01), Abrams
patent: 1100170 (1914-06-01), Brosius
patent: 3153798 (1964-10-01), Drevitson
patent: 3480980 (1969-12-01), Yoon et al.
patent: 3580373 (1971-05-01), Stickle
patent: 3818528 (1974-06-01), Petersen
patent: 4368553 (1983-01-01), Perry
patent: 4528711 (1985-07-01), Packer
patent: 4817224 (1989-04-01), Visnaw et al.
patent: 5033146 (1991-07-01), Fogarty, et al.

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