| K961346 | PH ANALYSIS MODULE | January 29, 1997 |
| K925405 | ZINETICS COMPOSITE SENSOR PROBE W/INTERNAL REF. | September 30, 1994 |
| K924875 | MICROTRAPPER/MICRODIGITRAPPER, ADD MODIFICATIONS | June 30, 1994 |
| K914793 | MONOCRYSTANT PH/LES CATHETER, MODIFICATION | December 13, 1993 |
| K924383 | SYNECTICS LIBERTY SYSTEM, PC POLYGRAF/POLYGRAM URO | June 18, 1993 |
| K913817 | MONOCRYSTANT PH-REFERENCE CATHETER, MODIFICATION | June 11, 1992 |
| K914624 | PH METER, MODIFICATION | April 28, 1992 |
| K914219 | AIRWAY THERMISTOR | February 26, 1992 |
| K913387 | DIGITRAPPER MARK III | December 27, 1991 |
| K904625 | SYNECTICS LIBERTY SYSTEM, PC POLYGRAF AND POLYGRAM | August 20, 1991 |
| K905520 | MICROTRAPPER/MICRODIGITRAPPER, MODIFICATION | April 26, 1991 |
| K900494 | SYNECTICS LIBERTY SYSTEM, PC POLYGRAF & POLYGRAM | June 11, 1990 |
| K902366 | MODIFIED PROXIMA MONITOR/DIGITRAPPER ED UNIT | June 8, 1990 |
| K880581 | AMBUL. PH & MOTILITY RECORDER FOR MEASURE OF PARA. | August 11, 1988 |
| K872712 | PC POLYGRAF | March 18, 1988 |
| K871282 | SYNECTICS LIBERTY SYSTEM AMPLIFIER AND SOFTWARE | June 10, 1987 |
| K862929 | SYNECTICS MOTILITY SYSTEM | October 20, 1986 |
| K853648 | SYNECTICS LIBERTY SYS COMPRIS DIGITRAPPER MK II MO | November 18, 1985 |
| K850361 | SYNECTICS PH SYS COMPRISING DIGITRAPPER MARK II, E | May 1, 1985 |