Electronic drum instrument
Patent 4781097 Issued on November 1, 1988. Estimated Expiration Date: 
September 8, 2006. 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.
September 8, 2006. 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 3551580 3553339 Electronic percussion instrument Device for producing sounds, which can be coupled to a musical instrument Electronic percussion synthesizer Multiple drum pad isolation Patent #: 4479412 InventorsAssigneeApplicationNo. 06/905069 filed on 09/08/1986US Classes:84/738Envelope shaping (e.g., attack, decay, sustain, or release, etc.)ExaminersPrimary: Witkowski, S. J.Attorney, Agent or FirmInternational ClassesG10H 3/14 (20060101)G10H 3/00 (20060101) Foreign Application Priority Data1985-09-19 JPAbstractA plurality of drum pads are each provided with a respective piezoelectric pick-up. The output of each piezoelectric pick-up is fed to a corresponding envelope-extracting circuit. The envelope signal extracted by the envelope-extracting circuit is converted by an A/D converter into a digital signal which is fed to a CPU. The CPU feeds a tone designation signal to a tone generator unit according to parameter data from a parameter data setter and the digital signals noted above, thereby causing generation of a corresponding drum sound.Other References
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