Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 5343375 | Emergency egress illuminator and marker light strip An emergency lighting strip provides for illumination of the floor of an emergency egress passageway during clear air conditions and also marks an escape path during conditions of limited visibility. The strip mounts two strings of narrow cone L.E.D.s in ... | 08/30/1994 |
| 5291195 | Target light for docking A docking target (10) includes three concentric circles (C1, C2, C3) each comprising a plurality of different color light emitting diodes (D1, D2, D3) spaced about the circumference of each circle (C1, C2, C3). During vehicle approach, each circle appears... | 03/01/1994 |
| 5153722 | Fire detection system A fire detection system includes a color video camera, a frame grabber and a computer processor operative to store and examine a series of image frames of the viewed area. Ultraviolet and infrared detectors produce event signals when energy received excee... | 10/06/1992 |
| 5130909 | Emergency lighting strip An emergency aid, in the form of a lighting strip arranged along the floor of a predetermined escape route, is provided for guiding the escape of occupants from a confined area during conditions of severely reduced visibility. The strip comprises a plural... | 07/14/1992 |
