| FINE WIRE ELECTRODE MMODEL NUMBERS 221-14-730, 221-24-730, 221-14-550, 221-24-550 (K982950) | Chalgren Enterprises, Inc. | 1999-06-22 |
| RE-USABLE BIPOLAR CONCENTRIC NEEDLE(237-XXX-24,237-XXX-24STP, 237-XXX-24TP,237-XXX-24STP (K960591) | Chalgren Enterprises, Inc. | 1996-06-13 |
| DISPOSABLE HYPODERMIC MONOPOLAR NEEDLE RECORDING ELECTRODE (K955335) | Chalgren Enterprises, Inc. | 1996-01-29 |
| EMG DISC RECORDING ELECTRODE (K953354) | Chalgren Enterprises, Inc. | 1996-01-22 |
| EMG RECORDING RING ELECTRODE (K953356) | Chalgren Enterprises, Inc. | 1996-01-22 |
| EMG DISC RECORDING ELECTRODE (K953361) | Chalgren Enterprises, Inc. | 1996-01-22 |
| EMG DISC RECORDING ELECTRODE WITH PIN (K952690) | Chalgren Enterprises, Inc. | 1995-12-06 |
| EMG DISC RECORDING ELECTRODE WITH PIN (K952908) | Chalgren Enterprises, Inc. | 1995-12-06 |
| RE-USABLE MONOPOLAR NEEDLE (K953886) | Chalgren Enterprises, Inc. | 1995-10-31 |
| RE-USABLE CONCENTRIC NEEDLE (K953887) | Chalgren Enterprises, Inc. | 1995-10-31 |
| 32MM NICKEL PLATED DISC ELECTRODE (K953220) | Chalgren Enterprises, Inc. | 1995-10-06 |
| 22MM STAINLESS STEEL DISC ELECTRODE, WITH PIN (K953219) | Chalgren Enterprises, Inc. | 1995-10-06 |
| DISPOSABLE HYPODERMIC MONOPLAR NEEDLE RECORDING (K924277) | Chalgren Enterprises, Inc. | 1994-12-07 |
| DISPOSABLE CONCENTRIC NEEDLE ELECTRODE (K931029) | Chalgren Enterprises, Inc. | 1994-08-25 |
| DISPOSABLE CONCENTRIC NEEDLE ELECTRODE (K924521) | Chalgren Enterprises, Inc. | 1993-02-12 |
| REUSABLE FINGER CLIP RECORDING ELECTRODE (K925706) | Chalgren Enterprises, Inc. | 1993-02-10 |
| REUSABLE DUAL DISC BAR RECORDING ELECTRODES (K923665) | Chalgren Enterprises, Inc. | 1992-10-05 |
| REUSABLE DUAL DISC BAR ELECTRODES, VARIOUS MODELS (K921504) | Chalgren Enterprises, Inc. | 1992-09-11 |
| DISPOSABLE MONOPOLAR NEEDLE ELECTRODE, VAR MODELS (K912282) | Chalgren Enterprises, Inc. | 1992-03-16 |
| DETACHABLE, DISPOSABLE MONOPOLAR NEEDLE ELECTRODE (K912283) | Chalgren Enterprises, Inc. | 1992-03-16 |
| DISP. CONCENTRIC NEEDLE ELECTRODE (DCP-30, DCP-45) (K896370) | Chalgren Enterprises, Inc. | 1989-12-22 |