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| US5422623 | 5 Ago 1993 | 6 Jun 1995 | Federal Signal Corporation | Programmable emergency signalling device and system |
| US6100791 | 6 Oct 1994 | 8 Ago 2000 | Federal Signal Corporation | Programmable emergency signalling device and system |
| US7019703 | 7 May 2004 | 28 Mar 2006 | Andrew Corporation | Antenna with Rotatable Reflector |
| USD244038 | 2 Jul 1976 | 12 Abr 1977 | Mecaniplast | Easel type boomerang antenna |
| USD244039 | 2 Jul 1976 | 12 Abr 1977 | Mecaniplast | Easel type antenna |
| USD244040 | 2 Jul 1976 | 12 Abr 1977 | Mecaniplast | Boomerang antenna |
| USD244096 | 2 Jul 1976 | 19 Abr 1977 | Mecaniplast | Plate-type antenna |
