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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 |
| 6249310 | Discrete surveillance camera devices A discrete surveillance device for observing a surveillance location has a housing formed in the shape of a smoke detector and multiple miniature video surveillance cameras mounted within the housing to simultaneously observe multiple areas of the surveil... | 06/19/2001 |
| 6064430 | Discrete surveillance camera devices A discrete surveillance device for observing a surveillance location has a housing formed in the shape of a smoke detector and multiple miniature video surveillance cameras mounted within the housing to simultaneously observe multiple areas of the surveil... | 05/16/2000 |
| 6011469 | Overhead door position sensor mounting device An overhead door position sensor assembly includes a sensor actuating device, and a position sensor including a roller track clamping device for mounting the position sensor onto a roller track of an overhead door assembly. The sensor actuating device is ... | 01/04/2000 |
| 5936533 | Method of automatic verification of smoke detector operation within calibration limits A self-contained smoke detector system has internal self-diagnostic capabilities and accepts a replacement smoke intake canopy (14) without a need for recalibration. The system includes a microprocessor-based self-diagnostic circuit (200) that periodicall... | 08/10/1999 |
| 5844458 | Resilient and compressible magnet module for door channel installation A resilient and compressible door channel magnet module facilitates the installation of a door channel magnet. The module comprises a magnet set supported inside a magnet holder that is connected to a flexible and deformable outer ring by a set of elongat... | 12/01/1998 |
| 5831537 | Electrical current saving combined smoke and fire detector A fire detection system (10) includes a smoke detector (52) that measures smoke particle density indicative of smoldering fires and a CO2 detector (90) that measures CO2 concentration indicative of flaming fires. In a first operating... | 11/03/1998 |
| 5821866 | Self-diagnosing smoke detector assembly A self-contained smoke detector system has internal self-diagnostic capabilities and accepts a replacement smoke intake canopy (14) without a need for recalibration. The system includes a microprocessor-based self-diagnostic circuit (200) that periodicall... | 10/13/1998 |
| 5798701 | Self-adjusting smoke detector with self-diagnostic capabilities A smoke detector (10) has internal self-adjustment and self-diagnostic capabilities. It includes a microprocessor-based alarm control circuit (24) that periodically checks the sensitivity of a smoke sensing element (20) to a smoke level in a spatial regio... | 08/25/1998 |
