|
| US4008711 | 30. Juni 1975 | 22. Febr. 1977 | Charles P. Olinger | Method and apparatus for non-invasive detection of intracranial aneurysms |
| US4141350 | 10. Sept. 1976 | 27. Febr. 1979 | Nippon Colin Co., Ltd. | Vascular sound detector |
| US4218584 | 10. Okt. 1978 | 19. Aug. 1980 | | Stethoscope for use on a horse |
| US4528690 | 12. März 1984 | 9. Juli 1985 | Genovation, Inc. | Compact hybrid stethoscope |
| US4598417 | 15. Aug. 1984 | 1. Juli 1986 | Research Corporation | Electronic stethoscope |
| US4672976 | 10. Juni 1986 | 16. Juni 1987 | Cherne Industries, Inc. | Heart sound sensor |
| US4672977 | 10. Juni 1986 | 16. Juni 1987 | Cherne Industries, Inc. | Lung sound cancellation method and apparatus |
| US4783813 | 24. Dez. 1986 | 8. Nov. 1988 | Lola R. Thompson | Electronic sound amplifier stethoscope with visual heart beat and blood flow indicator |
| US5602924 | 9. Dez. 1993 | 11. Febr. 1997 | Theratechnologies Inc. | Electronic stethescope |
| US5825895 | 19. Juli 1996 | 20. Okt. 1998 | StethTech Corporation | Electronic stethoscope |
| US5852263 | 31. Mai 1995 | 22. Dez. 1998 | Minnesota Mining and Manufacturing Company | Stethoscope having microphone in stem of chestpiece |
| US5932849 | 13. Nov. 1992 | 3. Aug. 1999 | Minnesota Mining And Manufacturing Company | Stethoscope having microphone therein |
| US6002777 | 17. März 1998 | 14. Dez. 1999 | StethTech Corporation | Electronic stethoscope |
| US6026170 | 27. Nov. 1995 | 15. Febr. 2000 | Minnesota Mining and Manufacturing Company | Electronic stethoscope with idealized bell and idealized diaphragm modes |
