Abstract: A sales system includes a bar code scanner, a time stamp bar code adaptor, and a point of sale (POS) terminal. The time stamp bar code adaptor is configured for receiving the bar code scanned by the bar code scanner, extracting the country of origin, the manufacturer code, the product code, the date of production, the valid period, and the ID from the received bar code, and generating a sub code indicative of a ratio of a period, having elapsed from the date of production, to a point of sales, to the valid period. The POS terminal is configured for managing a product code table and a time stamp code table containing discount rate information, and calculating a discount price based on the elapsed period using the bar code and the sub code provided by the time stamp bar code adaptor.

Abstract: A surface traveling mobile apparatus which moves by an endless track belt installed to be wrapped around a case from end to end, traveling on a surface by the rotation of wheels driven by a power source is provided. The surface traveling mobile apparatus includes vacuum chambers installed to be attached to the sides of the wheels, a vacuum tube for connecting the vacuum chambers to each other, a vacuum pump formed in part of the vacuum tube, the vacuum pump for inhaling and exhausting air, and suction mechanisms installed along the endless track belt at predetermined intervals, valve driven by contacting the wheels, and vacuum attached to the surface by the vacuum pump inhaling and exhausting air. Also, a cleaning apparatus including a spray unit for spraying water or wash liquid to the surface when the surface traveling mobile apparatus moves, and a rotating brush for washing the surface using the sprayed liquid, are provided.

Abstract: A shoe corrector for correcting the shape of a shoe such that it completely fits a wearer's foot and making the interior space dry and clean is provided. The shoe corrector allows each individual's foot to be accustomed to shoes which are mass produced with standardized dimensions thus providing more comfort to the wearer. Furthermore, the shoe corrector prevents the shoe from deforming with long use.

Abstract: A method for diagnosing a vehicle state by connecting a vehicle equipped with an electronic control unit with a personal computer (PC) via a local area network (LAN) communication method, and then connecting the PC to a mechanic center on the Internet, is provided.