|
| US3947954 | 25 juin 1974 | 6 avr. 1976 | | Method of affixing and securing a radio to a motorcycle |
| US4152553 | 5 avr. 1978 | 1 mai 1979 | Maynard E. White | Protective helmet with voice communication system |
| US4310307 | 2 sept. 1980 | 12 janv. 1982 | | Dental audio and gaseous analgesia applicator |
| US4901356 | 18 déc. 1987 | 13 févr. 1990 | Actron Manufacturing Company | Voice transmission system |
| US5138666 | 9 sept. 1991 | 11 août 1992 | Actron Manufacturing Company | Voice transmission system |
| US5371804 | 15 nov. 1991 | 6 déc. 1994 | Actron Manufacturing Company | Voice transmission system |
| US5404577 | 18 juin 1991 | 4 avr. 1995 | Cairns & Brother Inc. | Combination head-protective helmet & communications system |
| US5428688 | 29 mars 1993 | 27 juin 1995 | Audiopack Sounds Systems | Voice transmission system with remote microphone |
| US5463693 | 10 nov. 1993 | 31 oct. 1995 | Audiopack Sound Systems Inc. | Voice amplification adapter assembly for face mask |
| US5574794 | 19 janv. 1995 | 12 nov. 1996 | Earmark, Inc. | Microphone assembly for adhesive attachment to a vibratory surface |
| US5678205 | 21 déc. 1994 | 14 oct. 1997 | CairnsAir, Inc. | Combination head-protective helmet and communications system |
| US7471651 | 28 août 2003 | 30 déc. 2008 | Broadcom Corporation | Transaction control system including portable data terminal and mobile customer service station |
| US7510121 | 22 mai 2006 | 31 mars 2009 | Broadcom Corporation | Multi-level hierarchical radio-frequency communication system |
| US7677245 | 14 mai 2003 | 16 mars 2010 | Dimar S.R.L. | Helmet for artificial respiration |
| US7885242 | 2 sept. 2003 | 8 févr. 2011 | | Enhanced mobility and address resolution in a wireless premises based network |
