Tinnitus-masker
Patent 5167236 Issued on December 1, 1992. Estimated Expiration Date: 
June 6, 2011. 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 6, 2011. 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 ReferencesTinnitus masker Patient controlled master hearing aid Patent #: 4759070 InventorApplicationNo. 690881 filed on 06/06/1991US Classes:600/559Ear or testing by auditory stimulusExaminersPrimary: Hindenburg, MaxAttorney, Agent or FirmForeign Patent References
International ClassA61B 005/00Foreign Application Priority Data1988-12-22 DEAbstractA tinnitus masker having an electric circuit arranged in a housing and an earpiece which produces a sound spectrum that masks the trinitus is disclosed. The electronic circuit is designed so that the sound spectrum produced by the earpiece contains a line spectrum with a fundamental tone. | |
