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A kissing shield comprised of a thin, flexible membrane and a frame or holder.
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| Number | Title | Issue Date |
| 7231992 | Drill bit A drill bit has, on its face, a combination of at least one straight cutting edge and at least two curved cutting edges arranged in a Y-shape. The cutting edges on the face of the drill bit are arranged such that they start from the axis of the drill bit or end dire... | 06/19/2007 |
| 7070010 | Drill bit A drill bit comprises, on its face, either only curved cutting edges or a combination consisting of at least one straight cutting edge and at least two curved cutting edges. The cutting edges on the face of the drill bit are arranged such that they start from the ax... | 07/04/2006 |
