United States Patent 2597407
Inventors:
Thompson, Earl G.
Publication Date:
05/20/1952
Assignee:
Thompson, Earl G.
Other Classes:
D24/217, 16/438, 211/74, 206/201, 206/205
International Classes:
A61J9/00
Foreign References:
| GB190714171A | | | | |
| GB253282A | | | | |
| FR355564A | | | | |