Radio frequency identification (RFID) tags; radio frequency identification (RFID) readers; buried utility locators, namely portable electronic devices for receiving magnetic field signals and determining information about hidden or buried pipes, cables, or conduits based on the received magnetic field signals; transmitters for generating current signals for coupling to hidden or buried pipes, cables, or conduits to generate magnetic fields for detection by buried utility locators; coupling devices for coupling current signals from transmitters to buried pipes, cables, or conduits; sondes for generating magnetic field signals for sensing by buried utility locators; video inspection systems including camera heads, push-cables, push-cable reels, and camera control units for controlling the camera heads and displaying and storing captured video, images, or data; software for generating mapping information associated with hidden or buried utilities; software for processing images or video based on information provided from RFID tags
Electrical and Scientific Apparatus