Process of making felted mineral fiber
United States Patent 1899056
Inventors:
Powell, Edward R.
Publication Date:
02/28/1933
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Assignee:
BANNER ROCK CORP
Primary Class:
Other Classes:
264/6, 65/443, 65/454, 156/497, 34/214, 425/83.100
International Classes:
C04B20/00; C04B26/00