United States Patent 3317722
Inventors:
Whitney, Frances L.
Publication Date:
05/02/1967
Assignee:
Whitney, Frances L.
Other Classes:
362/223, 362/84, 362/216
International Classes:
F21K7/00; F21S8/00; H05B33/00; H05B33/04; H05B33/06; H05B33/26; H05B33/02