Abstract: An article of manufacture for providing a theft-proof trailer hitch tongue is disclosed.

Abstract: An article of manufacture for providing a mobile jack rack supporting a plurality of uses is disclosed. The mobile jack rack has a tow bar for coupling to a vehicle trailer towing receiver, an upper support platform having a front side coupled to the tow bar and a plurality of sliding support flanges coupled to an upper side, a manual scissor jack coupled to an underside of the upper support platform, the manual scissor jack having a manual hand crank, a lower support base having a top side coupled to an opposite side of the manual scissor jack, a steering bar hinge coupled between the manual hand crank and the manual scissor jack to position the manual hand crank in an orientation allowing the manual hand crank to be used as a steering bar, a plurality of locking wheels coupled to an underside of the lower support platform, and a component coupled to the plurality of support flanges.

Abstract: An article of manufacture for providing a theft-proof trailer hitch tongue is disclosed.

Abstract: An article of manufacture for providing a double-hinged folding trailer according to the present invention is disclosed.

Abstract: An interactive on-line music training system for teaching music to students comprises a Student Station, a Teacher Station, and an Administrative Web Server connected over a communications network. The Student Station includes a computer which is integrated with a MIDI device (e.g. MIDI keyboard). The Administrative Web Server maintains a database for storing data related to the Student's performance. The Student uses the MIDI device to interact with the music course. As the Student traverses the music course, lessons and activities as well as the applicable MIDI files are downloaded from the Administrative Web Server to the Student Station's computer. The Student's responses to exercises are stored as a MIDI file on the student computer. Upon completion of a lesson, an activity is presented to the Student.