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The ornamental design for a siren, as shown and described. |
FIG. 1 is a perspective view of a siren for showing a new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a rear elevational view thereof; and,
FIG. 8 is a detail view thereof, wherein the siren has a bowed shape and the siren comprises a protuberant assembly on two sides of the siren to facilitate the emplacement and disassembly of the siren, an impeller-like vocal hole is located on a front end of the siren to enlarge the sound, a metal frame is fixed on a bottom of the siren to maintain the siren on a horizontal plane, and a screw is located on the bottom of the siren to adjust an angle of elevation of the siren.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Nov 23 1999 | HU, HSIN-KAI | Alertek Corporation | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 010447 | /0312 | |
Dec 03 1999 | Alertek Corporation | (assignment on the face of the patent) | / |
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