Collapsible bollard

Details Collapsible bollard Collapsible bollard

1989-04-13

1992-03-24

Word, A. Hugo

Building units and construction elements

Architectural stock material

Post or beam

Patent

active

D03249204

REFERENCES:
patent: D269209 (1983-05-01), Hegartg
patent: 282180 (1883-07-01), Erb
patent: 289803 (1883-12-01), Bethea
patent: 4576508 (1986-03-01), Dickinson
patent: 4802432 (1989-02-01), Poldervaart et al.
patent: 4917039 (1990-04-01), Siero

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