1978-12-12
1980-07-22
Holko, Thomas J.
85 31, E01B 912, F16B 1504
Patent
active
042133734
ABSTRACT:
A sheet metal nail of the type used to fasten a covering material to a lightweight base material in which a pair of interfitting generally U-shaped legs are connected to an enlarged head and such legs have means for spreading the legs apart when driven and means for locking the legs in spread apart condition.
REFERENCES:
patent: 1153335 (1915-09-01), Pleister
patent: 1480617 (1924-01-01), Hosnowski
patent: 1801147 (1931-04-01), Flora
patent: 2362969 (1944-11-01), Boelder
patent: 2550060 (1951-04-01), Gisondi
patent: 2674149 (1954-04-01), Benson
patent: 3466967 (1969-09-01), Hallock
patent: 3710672 (1973-01-01), Hallock
patent: 3878756 (1975-04-01), Hallock
patent: 4031802 (1977-06-01), Hallock
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