United States Patent 3512923
Inventors:
Dixon, Peter R.
Coppock, Alden D.
Publication Date:
05/19/1970
Assignee:
Peter, Dixon R.
Coppock, Alden D.
Other Classes:
8/149.100, 8/139.100, 68/139, 8/137
International Classes:
D06F35/00; D06F43/00; D06L1/02