Porthole cover for swimming-pool wall

Details Porthole cover for swimming-pool wall Porthole cover for swimming-pool wall

1989-04-17

1991-10-29

Word, A. Hugo

Building units and construction elements

Prefabricated unit

Closure

Patent

active

D03212580

REFERENCES:
patent: 814317 (1906-03-01), Parker
patent: 1392771 (1921-10-01), Laupretre
patent: 4976212 (1990-12-01), Camarota

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