Stethoscope
US4200169A · kind A · utility
28Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1978 |
| Grant date | Apr 29, 1980 |
| Priority date | — |
| Expiry date | Oct 16, 1998 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B7/026
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
This invention relates to a stethoscope having improved acoustical properties. The improvement comprises twin, smooth-walled sound pathways extending from the chestpiece to the ear tips which are free of sound leakage and each pathway has a constant diameter along its entire length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.