Radio apparatus; telecommunications apparatus; telecommunications instruments; apparatus for communication; apparatus for the communication of data; electronic tagging; electronic location apparatus; radio-frequency transmitter; apparatus for use in high-frequency reception; apparatus for use in high-frequency transmission; radio-frequency receivers; radio-frequency transmitter; wireless high frequency transmission instruments; global positioning apparatus; global positioning instruments; mechanisms for use in positioning systems (electric); electronic tags; tags carrying magnetically, optically, or electronically recorded or encoded information; apparatus for signalization in mines; safety monitoring apparatus (electric)