A kissing shield comprised of a thin, flexible membrane and a frame or holder.
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| Number | Title | Issue Date |
| 5747862 | Spin-polarized electron emitter having semiconductor opto-electronic layer with split valence band and reflecting mirror An electron emitting element including a semiconductor opto-electronic layer having a split valence band and capable of emitting a beam of spin-polarized electrons from an emitting surface thereof upon incidence of an excitation laser radiation upon the e... | 05/05/1998 |