Material or article handling equipment – Conveying – lifting – or transferring article – Ramp
Patent
1990-02-14
1992-06-30
Burke, Wallace R.
Material or article handling equipment
Conveying, lifting, or transferring article
Ramp
Patent
active
D03275590
REFERENCES:
patent: D310747 (1990-09-01), Isogai
patent: 1212524 (1917-01-01), Lucas
patent: 4878000 (1989-11-01), Dell
Colson Catalog, Sep. 18, 1961, p. 1nW-21, lever, circled item on right of page.
Dreyfuss Symbol Sourcebook, 1973, p. 160, window `up, down` symbol, circled item near top of page.
Lectric Lites Co. Cat., 1979, p. 5 two-way traffic sign, item No. Wl-7 located 2nd row, second sign from right.
Baynham H.
Burke Wallace R.
Gernstein Terry M.
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