Screw

Details Screw Screw

1991-03-14

1994-01-25

Bullock, B. J.

Tools and hardware

Fastener, support or mount not elsewhere specified

Fastener or coupling

Patent

active

D03435717

REFERENCES:
patent: 161390 (1875-03-01), Cummings
patent: 378614 (1888-02-01), Palmer
patent: 1897196 (1933-02-01), Hunt
patent: 2684094 (1954-07-01), Lissy
patent: 3808937 (1974-05-01), Roehrig
patent: 4572039 (1986-02-01), Desjardins
"Handbook of Pictorial Symbols"; R. Modley; .COPYRGT.1976; p. 52; anchor symbol (line 5).

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