PUNCHED ACOUSTICAL BOARD
United States Patent 3470978
US Patent References:
Acoustical material
- - 3013626

Acoustical material and method of making the same
- - 3017947


Inventors:
Wagtskjold, Halvor Paul
Sundin, George H.
Carlson, Lorien A.
Publication Date:
10/07/1969
View Patent Images:
Download PDF 3470978 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
CONWED CORP
Primary Class:
181/293
Other Classes:
83/867, 162/286
International Classes:
B26F1/24; G10K11/172; B26F1/00; G10K11/00; G10K11/04
Foreign References:
FR1273284A




<- Previous Patent (FIRE RESISTANT GLASS...)   |   Next Patent (FLUID PULSATION DAMP...) ->