Tools, namely, electronic devices and apparatus for mapping empty ducts, conduits and pipes, using radio frequency, global positioning systems, wireless networks and cellular communication networks; tools, namely, electronic devices and apparatus for mapping empty ducts, conduits and pipes, using radio frequency, global positioning systems, wireless networks and cellular communication networks, that locate conduit; tools, namely, electronic devices and apparatus for mapping empty ducts, condu...

Plumbing services; Construction services, namely installation of plumbing, refrigeration systems, and HVAC systems; mechanical services