Protective mask communication devices and systems for use in hazardous environments
US6121881A · kind A · utility
118Cited by
46References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1998 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Jul 31, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2420/07
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Protective mask communication systems are provided for use in hazardous environments, e.g., firefighting and hazardous waste clean-up operations. The systems allow wearers of protective masks working in a hazardous area to readily communicate both with each other and with personnel and automated systems outside of the area. Preferred systems provide short range radio communication between mask wearers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.