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

An extension member is attachable to a trailer hitch and extends away from the vehicle and is connected to a seating frame supporting a toilet seat.

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Class 238/330 - Integral

Subclass of Class 238 - Railways: surface track
Definition: except that the anticreeper is an integral structure.
No. of patents: 0