United States Patent 2758082
Inventors:
Rohrman, Frederick A.
Publication Date:
08/07/1956
Assignee:
Rohrman, Frederick A.
Other Classes:
420/528, 204/196.210, 204/293, 429/47, 204/196.230
International Classes:
B63B59/04; C23F13/02; B63B59/00; C23F13/00