US PATENT SUBCLASS 114 / 177
.~ Light and air
Current as of: June, 1999
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| 114 / | HD | SHIPS |
|
| 173 | DF | PORTS {2} |
| 177 |  | .~ Light and air {1} |
| 178 | DF | .~.~> Hinged covers |
DEFINITION
Classification: 114/177
Ports, usually of circular shape, designed to secure light and air, and smaller than cargo or gun ports.