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| Number | Title | Issue Date |
| 6987445 | Water resistant audible signal The invention is an modified audible signal, such as a piezoelectric noise-making and audible signaling device, which further includes a hydrophobic covering material, such as polytetrafluoroethylene (PTFE). The hydrophobic covering material is known to be water res... | 01/17/2006 |
| 5099220 | Waterproof flush mount marine horn assembly A waterproof flush-mountable marine horn assembly includes a generally cup-shaped housing having a bottom wall and upstanding side wall means. The side wall means includes a top edge portion which defines a top rim of the housing, which top rim defines th... | 03/24/1992 |
| 5022341 | Horn A vehicle air horn is disclosed which is provided with heating cartridges and a temperature sensing switch. The temperature sensing switch automatically turns the heating cartridges on and off at predetermined temperatures. This automatic heating facility... | 06/11/1991 |
| 4896134 | Armored self-contained outdoor/indoor siren assembly An armored self-contained outdoor/indoor siren assembly which eliminates the need for an additional protective box and an additional tamper switch which are generally used in the prior art installations. The armored siren assembly of the invention consist... | 01/23/1990 |
| 4250573 | Digital alarm wristwatch A digital display electronic alarm wristwatch which includes a watch case, a cover glass and a case back contains an electro-optical display device, electronic watch body and an alarm buzzer mounted in the watch case and case back not to overlap with the ... | 02/10/1981 |
| 4037328 | Spatial orientation device A navigational device for use by underwater swimmers and divers in which a telescopically extensible boom is releasably and pivotally attached to the swimmer or diver. A compass device such as a magnetometer or fluxgate sensor is mounted at the end of the... | 07/26/1977 |
| 3950744 | Modular buzzer with diaphragm molded into housing A modular buzzer device which includes a striker arm, a diaphragm, and electromagnetic means for oscillating the striker arm. The device is housed in a container with a shape and size corresponding to a common electronic component configuration. The diaph... | 04/13/1976 |
