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| K974658 | INFRARED GROUP AMPLIFICATION SYSTEM, INFRARED EMITTER, INFRARED BODY WORN RECEIVER, INFRARED HEADSET | February 25, 1998 |
| K974287 | FM RECEIVER - AUDITORY TRAINER | February 10, 1998 |
| K950730 | GROUP AUDITORY TRAINER (GROUP AMPLIFICATION SYSTEM) | June 30, 1995 |
| K940313 | PHONIC EAR | March 22, 1994 |
| K923234 | PE 400IR, PE 400T, PE 400E | September 29, 1992 |
| K922720 | GROUP AUDITORY TRAINING SYSTEM | August 24, 1992 |
| K912356 | GROUP AUDITORY TRAINER,FM RECEIVER | August 15, 1991 |
| K893431 | AUDITORY TRAINER PE150R FM RECEIVER | August 21, 1989 |
| K882409 | PE100R FM RECEIVER USED W/PE100T FM TRANSMITTER | July 5, 1988 |
| K881099 | PE485R FM RECEIVER USED W/PE481FST FM TRANSMITTER | June 7, 1988 |
| K874304 | PHONIC EAR, PE 860C, PE 860PPC AND PE 860 PPCL | November 20, 1987 |
| K872473 | POST-AURICULAR HEARING AID MODEL PE 805CD2 | July 28, 1987 |
| K872474 | POST-AURICULAR HEARING AID MODEL PE 805 SCD2 | July 28, 1987 |
| K864672 | PHONIC EAR MODELS PE 811CS AND PE 811CST | February 20, 1987 |
| K862773 | PHONIC EAR, MODEL PE475R | October 9, 1986 |
| K862229 | PHONIC EAR PE 602 PPCS | July 22, 1986 |
| K862162 | PHONIC EAR, MODEL PE 1800 | July 18, 1986 |
| K861857 | PHONIC EAR | June 9, 1986 |
| K844862 | POST-AURICULAR HEARING AID MODEL PE 600PPCH | April 8, 1985 |