|
| US3942535 | 26 Jul 1974 | 9 Mar 1976 | G. D. Searle & Co. | Rechargeable tissue stimulating system |
| US4000461 | 4 Oct 1973 | 28 Dec 1976 | Textronix, Inc. | R-wave detector |
| US4027663 | 6 Oct 1975 | 7 Jun 1977 | Yeda Research & Development Co. Ltd. | Heart beat detector |
| US4083366 | 16 Jun 1976 | 11 Apr 1978 | Peter P. Gombrich | Heart beat rate monitor |
| US4086917 | 2 Feb 1976 | 2 May 1978 | Medical Instruments & Technology Corp. | Fetal heart rate monitoring system |
| US4157087 | 6 Mar 1978 | 5 Jun 1979 | Med General, Inc. | Peripheral nerve stimulator |
| US4164227 | 27 Sep 1978 | 14 Aug 1979 | Medalert Corporation | Rate failure indicator |
| US4164946 | 27 May 1977 | 21 Aug 1979 | Mieczyslaw Mirowski | Fault detection circuit for permanently implanted cardioverter |
| US4223678 | 3 May 1978 | 23 Sep 1980 | Mieczyslaw Mirowski | Arrhythmia recorder for use with an implantable defibrillator |
| US4296755 | 19 Mar 1980 | 27 Oct 1981 | Datamedix Inc. | Method and apparatus for determining ventricular fibrillation |
| US4832038 | 20 Jan 1987 | 23 May 1989 | The Board of Trustees of University of Illinois | Apparatus for monitoring cardiovascular regulation using heart rate power spectral analysis |
| US4862361 | 5 Jun 1985 | 29 Aug 1989 | Massachusetts Institute of Technology | Methods and apparatus for monitoring cardiovascular regulation using heart rate power spectral analysis |
| US4958632 | 5 Mar 1980 | 25 Sep 1990 | Medtronic, Inc. | Adaptable, digital computer controlled cardiac pacemaker |
| US5058599 | 14 Jun 1990 | 22 Oct 1991 | Siemens Aktiengesellschaft | Method and apparatus for detecting a sequence of abnormal events in an electrical signal, particularly in the depolarization signal of a heart |
| US5318593 | 18 Nov 1991 | 7 Jun 1994 | Medtronic, Inc. | Multi-mode adaptable implantable pacemaker |
| US5500008 | 29 Mar 1994 | 19 Mar 1996 | Ventritex, Inc. | Method and apparatus for delivering defibrillation shocks with improved effectiveness |
| US5531767 | 25 May 1995 | 2 Jul 1996 | Ventritex, Inc. | Method and apparatus for delivering defibrillation shocks with improved effectiveness |
| US5749901 | 7 May 1996 | 12 May 1998 | Pacesetter, Inc. | Method and apparatus for delivering defibrillation shocks with improved effectiveness |