05142700 is referenced by 69 patents and cites 6 patents.

A protective helmet, such as a football helmet, motorcycle helmet, construction helmet, or the like comprises a shell made of impact-resistant material. Inside of the helmet is a complete transceiver system which allows two-way wireless communication between persons in the same location or to a remote base unit. No components of the system protrude from either the interior or exterior of the helmet shell as the antenna follows the configuration of the shell centerline while one or more microphones are contained within elements of the face guard. A switch device, also contained within the face guard and including an illuminated element, is disposed within the field of view of the wearer.

Title
Protective helmet containing an integral transceiver
Application Number
7/572562
Publication Number
5142700
Application Date
August 27, 1990
Publication Date
August 25, 1992
Inventor
John W Reed
5340 Terry Ave., St. Louis, 63120
MO, US
Agent
Richard C Litman
IPC
H04B 1/10
View Original Source