Electronic stethoscope
Patent 4170717 Issued on October 9, 1979. Estimated Expiration Date: 
June 12, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 12, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3182129 3247324 3539724 InventorApplicationNo. 05/914732 filed on 06/12/1978US Classes:600/528, Detecting heart sound381/67STETHOSCOPES, ELECTRICALExaminersPrimary: Claffy, Kathleen H.Assistant: Kemeny, E. S. Attorney, Agent or FirmInternational ClassesA61B 7/00 (20060101)A61B 7/04 (20060101) AbstractA portable, lightweight, self-contained stethoscope includes:(a) an enclosure containing a speaker, and having an acoustic wave outlet port connectible to stethoscope flexible tubing,(b) a housing,(c) a transducer carried by the housing, the transducer including a microphone located to be placed in proximity to a patient's body,(d) circuitry in the housing and having an input terminal coupled with the transducer, said circuitry including amplifier means and filter means, and a battery power supply coupled with said circuitry, said circuitry having a first output terminal, and(e) flexible connection means coupling said first output terminal with said speaker. | |
