Title:
Sheet metal closures for hatchways
United States Patent 2725003
Inventors:
Lyons, Robert J.
Publication Date:
11/29/1955
Assignee:
Lyons, Robert J.
Other Classes:
52/19, 49/389, 454/369, 16/401, 114/201R, 49/398, 49/33
International Classes:
E06B5/01; E06B5/00