Light guide for a trailer hookup

Load damping frame hitch for vehicles towing a trailer

Load skidding vehicle with weight transferring grapple

Load-stabilizing trailer hitch

Lock construction

Lockbox for hitch receiver

Locking assembly for trailer hitches

Locking device for a draw pin

Locking device for an omnibus-trailer combination

Locking device for trailer hitches and method therefor

Locking device for trailing hitch assembly

Locking mechanism for trailer coupling

Locking trailer coupling

Magnetic coupler

Manifold system

Manually operated trailer hitch with extendable swinging boom

Mechanical wheel lift assembly

Mechanism for retractable gooseneck hitch ball

Method and apparatus for use with a trailer

Method for securing axle to truck frame for non...