Sound cage

Details Sound cage Sound cage

1995-04-12

1997-09-02

Zarfas, Louis S.

Building units and construction elements

Structure

Single occupant type, i.e., telephone booth, privy, ticket...

D25 17, D25 1, 2503

Patent

active

D03832171

REFERENCES:
patent: D292436 (1987-10-01), Richter
patent: 1705778 (1929-03-01), Munroe et al.
patent: 2796636 (1957-06-01), Heerwagen
patent: 2938526 (1960-05-01), Harrison, III et al.
patent: 3014558 (1961-12-01), Noyes
patent: 3517468 (1970-06-01), Woods

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