Damping element
Patent 3930560 Issued on January 6, 1976. Estimated Expiration Date: 
January 6, 1993. 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.
January 6, 1993. 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 ReferencesInventorsAssigneeApplicationNo. 05/488300 filed on 07/15/1974US Classes:181/160, With resonant chamber181/146, With sound-asborbing means181/158, Microphone type181/196, Within tubular means381/354Absorbing or attenuating elementExaminersPrimary: Tomsky, Stephen J.Attorney, Agent or FirmInternational ClassesG10K 11/02 (20060101)G10K 11/00 (20060101) H04R 25/00 (20060101) H04R 1/22 (20060101) H04R 001/28 () G10K 013/00 () H04R 007/00 () AbstractA damping element comprising fiberous fuseable material shaped to form a cup-like member which may be inserted in the sound openings of an acoustic transducer to provide a selected acoustic resistance. | |
