U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

A self contained protective enclosure with an opening for entry and egress and a screen for ventilation and viewing.

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Class 104/237 - Sprocket belt

Subclass of Class 104 - Railways
Definition: Grippers having one or both faces of the gripping-jaws formed
No. of patents: 0