Med-Dyne was originally founded as Johnson Medical Specialties, Inc. in Louisville, Kentucky in August of 1993 by E.W. Johnson, Jr.; at which time, the company's main focus was on the wholesaling of filters for oxygen concentrators. Within a few months of operation, Johnson Medical was able to acquire the assets of Terra-Con, Inc., a Vermont based company also specializing in air filtration devices. The Terra-Con operation was relocated to Louisville and operated under the name of Johnson Medical Specialties, Inc.n 1995, Premier Medical Products, Inc. began manufacturing its own filters for oxygen concentrators. The company also acquired TransAmerica TENS, located in Connecticut who specialized in Transcutaneous Electrical Nerve Stimulation (TENS) units and accessories. The TransAmerica TENS operation was moved to Louisville and operated under the Premier Medical Products, Inc. name.