Decorative acoustical panel

Details Decorative acoustical panel Decorative acoustical panel

1975-09-11

1978-09-12

Word, A. Hugo

Building units and construction elements

Structure

Simulative

D25 80, D25 94, D25 97, D2501

Patent

active

D02493675

REFERENCES:
patent: 2870439 (1959-01-01), Stinehelter
patent: 3146498 (1964-09-01), Eckel
patent: 3786898 (1974-01-01), Fujii
Charles Industries Corp. pamphlet, received in PTO, Jul. 1, 1975, p. 5, Sonex panels.

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