Combination head-protective helmet & communications system
Patent 5404577 Issued on April 4, 1995. Estimated Expiration Date: 
April 4, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 4, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2942072 3586977 Ambient noise shielded ear transceiver Emergency breathing apparatus Telephone and holding band therefor Helmet with two-way radio communication faculty Ventilated hood for firefighter Protective helmet containing an integral transceiver Patent #: 5142700 Inventors
AssigneeApplicationNo. 716707 filed on 06/18/1991US Classes:455/66.1, Having diverse art device455/351TransportableExaminersPrimary: Urban, Edward F.Attorney, Agent or FirmInternational ClassH04B 001/38AbstractA generally hands-free, voice communication system in combination with a head-protective helmet. The helmet protects the wearer's head and the communications system permits voice communications between journeyman personnel, e.g. firefighters, police, military, industrial, hazardous material handling personnel, in relatively close proximity with each other and between journeymen and a group leader; and the group leader's communication system to also permit relatively long-range communication between the group leader and a relatively distant communications center such as a fire engine or distant fire company, base station or repeater.Field of SearchCombined with diverse art deviceCabinet, housing, or chassis structure With retractable or readily detachable chassis Sectional or interconnectable (e.g., modules) With particular speaker mounting Transportable Switch-type detector or modulator Body supported (e.g., headgear) Firemen's helmets Heat resistant With transmission line | |
