United States Patent 3218738
Inventors:
Bowerman, Raymond E.
Publication Date:
11/23/1965
Assignee:
Bowerman, Raymond E.
Other Classes:
D15/11, 294/54.500
International Classes:
E04D13/10
Foreign References:
| CA618350A | | | | |
| GB320130A | | | | |
| SE96982A | | | | |
| SE102095A | | | | |
| CH263585A | | | | |