Underwater platform

Details Underwater platform Underwater platform

1990-06-21

1992-09-29

Word, A. Hugo

Building units and construction elements

Stair, ladder, scaffold, or similar support

D 6449, D 6462

Patent

active

D03299031

REFERENCES:
patent: D262827 (1982-01-01), Rinhard
patent: 657396 (1900-09-01), Curley
patent: 2582528 (1952-01-01), Cranford
patent: 3045253 (1962-07-01), Price
patent: 3907066 (1975-09-01), Newton
patent: 4222148 (1980-09-01), Olewinski et al.
patent: 4580777 (1986-04-01), Johnson
patent: 4619346 (1986-10-01), Deguerry
patent: 4776429 (1988-10-01), Osborn
patent: 4869343 (1989-09-01), Anderson

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