United States Patent 2830606
Inventors:
Daugherty, Louis E.
Publication Date:
04/15/1958
Assignee:
Daugherty, Louis E.
Other Classes:
52/2.240, 119/498, 119/436, 52/2.140
International Classes:
E04H15/20
Foreign References:
| GB190007552A | | | | |
| GB132134A | | | | |
| FR992086A | | | | |
| BE512001A | | | | |