United States Patent 2257451
Inventors:
Barnes, William A.
Publication Date:
09/30/1941
Assignee:
Barnes, William A.
Other Classes:
428/677, 228/214, 165/168, 428/939, 428/594, 428/925, 38/89, 76/101.100, 219/93, 38/93, 38/66
International Classes:
D06F75/38; D06F75/00