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| Number | Title | Issue Date |
| 6637481 | Apparatus for sharpening a writing instrument An apparatus for sharpening a writing instrument, e.g. an electric pencil sharpener, is disclosed as including a body for receiving a pencil for sharpening, and a base, the base having a bottom surface to support the apparatus on a surface, and the body m... | 10/28/2003 |
| 3991798 | Disposable device for sharpening leads or the like A device is provided for sharpening leads of pencils or the like. The sharpening device is disposable and is designed to be thrown away when filled, without the necessity for cleaning out the device which inherently results in a dirty mess and in a waste ... | 11/16/1976 |
| 3973604 | Single cutter pencil sharpener A pencil sharpener has a housing, a single cutter mounted for rotation in the housing, and a fixed pencil guide mounted in the housing and having an opening facing the cutter to expose the end of a pencil to the cutter. A rotatably mounted tube coaxial wi... | 08/10/1976 |
