Dog Guard® and Out of Sight Fencing® are trademarks of Sunward Electronics, Inc. Dog Guard® Out of Sight Fencing® systems are often mistakenly referred to generically as an “invisible fence” or “invisible dog fence.” However, Invisible®, Invisible Fence® and Invisible Fencing® are brand names, products and registered trademarks of Radio Systems Corporation, Innotek, Inc. and/or Invisible Fence Inc. Dog Guard® is not associated or affiliated with Invisible Fence®/Invisible Fencing®, nor Radio Systems Corporation, Innotek, Inc. and Invisible Fence Inc.