Roof anchor for an existing roof

Tools and hardware – Fastener – support or mount not elsewhere specified – Support – guide – or spacer

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D12317, D 8356

Patent

active

D03291960

REFERENCES:
patent: D58002 (1921-05-01), Virden
patent: D275868 (1984-10-01), Ake
patent: D291058 (1987-07-01), Sorenson
patent: D309251 (1990-07-01), Palmer
patent: D314133 (1991-01-01), Issand
patent: 2891490 (1959-06-01), Elsner
patent: 3276731 (1966-10-01), Orchard
patent: 3297293 (1967-01-01), Andrews et al.
patent: 4431352 (1984-02-01), Andrews

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