Four point extrusion

Details Four point extrusion Four point extrusion

1988-02-16

1991-08-06

Word, A. Hugo

Building units and construction elements

Architectural stock material

Extruded shape

Patent

active

D03189260

REFERENCES:
patent: D287284 (1986-12-01), Pavy
Van Hoffel Tube Co. dated 1-1953, p. 73, Item located top of page, second from right #2434/.017.
Van Hoffel Tube Co. dated 1-1953, p. 47, top of page, third item from left of page, #2507/.020.

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