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Magician Harry Houdini patented a "Diver's Suit" enabling the wearer to "quickly divest himself of the suit while being submerged and to safely escape and reach the surface of the water."
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| Number | Title | Issue Date |
| 7363714 | Pencil sharpener A pencil sharpener has at least two sharpener units, each with a sharpener body and a shaving blade. The sharpener bodies of adjacent sharpener units being connected integrally via film strips acting as a predetermined bending point and/or predetermined separating p... | 04/29/2008 |
| 7229038 | Pastel stick sharpener A device for sharpening and shaping pastel sticks, and for storing pastel powder collected. The pastel stick sharpener is comprised generally of a powder receptacle, a screen removably carried by the powder receptacle, and a lid for securing the screen and for selec... | 06/12/2007 |
| 6427343 | Pencil sharpener having a pencil limiting device A pencil sharpener includes a casing secured in a housing and having a groove for receiving a pencil to be sharpened and having a cutter blade for sharpening the pencil. A device has a slide slidably received in the housing and has an extension extended f... | 08/06/2002 |
| 6301791 | Sharpener for soft-core pencils A sharpener for soft-core pencils includes a core shaper with a shaping edge for shaping the core tip, the edge being positioned in the free space in front of the pencil-guiding channel. This shaping edge is a part of a detachably-secured, separate insert... | 10/16/2001 |
| 4991299 | Universal crayon sharpener The invention provides a single, universal crayon sharpener capable of accommodating many different sizes of crayons or other similar marking instruments. The invention includes asymmetrical sharpening slots and cutting flanges which cooperate with an int... | 02/12/1991 |
| 4866810 | Apparatus for cleaning the nock end of an archery arrow An arrow shaft nock end cleaning apparatus includes a body member having a socket in one end arranged to receive the tapered nock end portion of an arrow having its nock removed. A plurality of knurled cleaning pins are disposed circumferentially around t... | 09/19/1989 |
| 4406315 | Pencil sharpener A pencil sharpener is constructed in the overall configuration of a pen, and arranged to fit within a person's breast pocket. The pencil sharpener includes a tubular receptacle having one closed end and a sharpening tool at its other, opened end. A cap is... | 09/27/1983 |
| 4237945 | Apparatus and method for abrading pencil lead An apparatus and method for abrading pencil lead are provided. The apparatus comprises two major parts-- a receptacle and an abrader. The apparatus is further modified by the addition of two subordinate components-- storage space and graphite dust cleanin... | 12/09/1980 |
| 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 |
