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| Number | Title | Issue Date |
| 6082579 | Vending machine In order to prevent a defective lock of an upper insulating door caused by its drooping and to improve productivity according to decreases in the number of parts and manufacturing cost, there is provided a vending machine having movable upper and lower in... | 07/04/2000 |
| 5896975 | Change storing apparatus and method for automatic vending machine An automatic vending machine, and more particularly to a change storing apparatus and method for an automatic vending machine which enables a user to store the amount of change as credit so that user can conveniently purchase goods by using the change sto... | 04/27/1999 |
| 5857239 | Vacuum cleaner having a wet duster device A vacuum cleaner comprising a moisture cleaner device which is easily attached and removed. The moisture cleaner device comprises a frame providing the circulation track of the moisture cleaner; a working roller and a driven roller mounted sideways in the... | 01/12/1999 |
