Radio apparatus head-protective helmet
US6298249A · kind A · utility
33Cited by
16References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 8, 1998 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Oct 8, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R5/0335
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Radio interface apparatus in combination with a lapel mounted microphone and speaker and a radio and with or without a head-protective helmet, radio interface apparatus in combination with a lapel-mounted radio and with or without a head-protective helmet, and radio interface apparatus for being mounted to the nape device of a head-protective helmet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.